{"id":73049,"date":"2023-12-02T13:15:54","date_gmt":"2023-12-02T12:15:54","guid":{"rendered":"https:\/\/cronuts.digital\/?p=73049"},"modified":"2026-07-15T09:33:40","modified_gmt":"2026-07-15T07:33:40","slug":"seo-crawler-web-crawlers-impact","status":"publish","type":"post","link":"https:\/\/cronuts.digital\/en\/seo-crawler-web-crawlers-impact\/","title":{"rendered":"Crawlers in SEO: What They Are, How They Work, and How to Optimize Crawling"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">If your site isn&#8217;t showing up where it should, it&#8217;s often not because you&#8217;re &#8220;missing keywords&#8221; or because the content is bad: <strong>it&#8217;s because the search engine isn&#8217;t even seeing what matters. <\/strong>And that&#8217;s where the <strong>crawler<\/strong> comes in. While you&#8217;re thinking about leads and closing opportunities, the crawler decides which pages it discovers, which ones it actually visits and which ones get left forgotten in a corner of your architecture.<\/p>\n<p>According to BrightEdge (2025), organic traffic accounts for <strong>53.3%<\/strong> of all web traffic, cementing its position as the most important acquisition channel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>CRONUTS.DIGITAL<\/strong> we approach <strong><a href=\"https:\/\/cronuts.digital\/seo-geo-contenidos-visibilidad-digital\/\">SEO<\/a><\/strong> with a very simple idea: if your site can&#8217;t be crawled properly, everything else becomes makeup. In this article you&#8217;ll understand what a <strong>crawler<\/strong> is, how it really works in the day-to-day of a B2B project in Spain, which technical signals help it (or hold it back) and how to turn crawling into an ally for gaining visibility without relying on &#8220;a thousand changes&#8221; that then never move the needle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-que-es-un-crawler-seo\">What is an SEO crawler?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">An <strong>SEO crawler<\/strong> (also called a <em>bot<\/em>, <em>spider<\/em> or <em>crawl robot<\/em>) is an automated program that <strong>browses web pages by following links<\/strong> and <strong>collects information<\/strong> so that a search engine can <strong>discover, understand and update<\/strong> what&#8217;s on a site. In other words:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>If your site can&#8217;t be crawled properly, the rest of your SEO is just makeup. We&#8217;ve seen projects where a misconfigured robots.txt left out 40% of business URLs. A crawler doesn&#8217;t forgive technical errors: it ignores them.<\/p><cite>Albert Puig Nav\u00e0s, CEO of CRONUTS.DIGITAL<\/cite><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">What a crawler does exactly<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">When a crawler arrives at a site, it usually:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Discovers URLs<\/strong>: it enters through a URL (home, sitemap, external links) and finds new pages through internal links.<\/li>\n\n\n\n<li><strong>Reads content and resources<\/strong>: it analyzes HTML, titles, headings, text, <a href=\"https:\/\/cronuts.digital\/core-web-vitals-que-son-como-optimizarlos\/\">structured data<\/a>, canonical, hreflang, etc. Depending on the case, it also tries to load resources such as CSS\/JS to interpret the page.<\/li>\n\n\n\n<li><strong>Detects technical signals<\/strong>: HTTP status (200, 301, 404\u2026), redirects, chains, server errors, response times.<\/li>\n\n\n\n<li><strong>Respects crawling rules<\/strong>: it takes into account <code>robots.txt<\/code>, meta robots (<code>noindex<\/code>, <code>nofollow<\/code>), headers (X-Robots-Tag) and other limits.<\/li>\n\n\n\n<li><strong>Sends the information for indexing<\/strong>: crawling doesn&#8217;t guarantee indexing; first it discovers and analyzes, and then the search engine decides whether to index.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-por-que-importa-en-seo\">Why it matters in SEO<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The crawler shapes three key things:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Discovery<\/strong>: if it doesn&#8217;t find a URL, that page practically &#8220;doesn&#8217;t exist&#8221; for the search engine.<\/li>\n\n\n\n<li><strong>Efficiency<\/strong>: your crawling allowance (<em>crawl budget<\/em>) is limited; architecture, links and performance help the bot invest its time in what matters.<\/li>\n\n\n\n<li><strong>Indexing quality<\/strong>: if the crawler sees thin, duplicate, blocked or confusing content (poorly rendered JS, incorrect canonical), indexing and ranking suffer.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console.jpg\" alt=\"SEO specialist analyzing crawl data in Google Search Console\" class=\"wp-image-66397\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-search-console-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Quick difference: crawler vs indexing vs ranking<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Ranking<\/strong>: decides the position each page appears in for a specific search.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Crawler<\/strong>: visits and collects.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Indexing<\/strong>: stores\/organizes what&#8217;s been crawled so it can be shown in results.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does it affect my site?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A crawler determines <strong>which URLs it discovers<\/strong>, <strong>how often it visits them<\/strong> and <strong>which technical and content signals it interprets<\/strong>. In practice, it impacts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Indexing<\/strong>: if a URL isn&#8217;t crawled (or is crawled poorly), it&#8217;s usually indexed late or not at all.<\/li>\n\n\n\n<li><strong>Organic visibility<\/strong>: important pages the bot rarely visits or finds with errors lose ranking opportunities.<\/li>\n\n\n\n<li><strong>Resource consumption<\/strong>: inefficient crawling (lots of useless URLs, parameters, duplicates) makes the bot &#8220;spend&#8221; visits where it shouldn&#8217;t.<\/li>\n\n\n\n<li><strong>Technical diagnosis<\/strong>: errors (4xx\/5xx), long redirects, high load times or blocks can reduce crawling and the quality of what gets processed.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">What do I do if I have crawling problems?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tackle the problem in this order (from most blocking to most optimizable):<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Check whether the bot can access<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Review <code>robots.txt<\/code> and <code>Disallow<\/code> rules.<\/li>\n\n\n\n<li>Review meta robots \/ headers: <code>noindex<\/code>, <code>nofollow<\/code>, <code>X-Robots-Tag<\/code>.<\/li>\n\n\n\n<li>Make sure there are no blocks from WAF\/CDN, rate limits or geoblocking.<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Identify errors and bottlenecks<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>5xx<\/strong> (server), <strong>4xx<\/strong> (broken URLs) and <strong>timeouts<\/strong>.<\/li>\n\n\n\n<li>Redirect chains or loops (301\u00e2\u2020\u2019301\u00e2\u2020\u2019200).<\/li>\n\n\n\n<li>Slowness: high TTFB and unstable response.<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>Ensure discovery of important URLs<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Up-to-date XML sitemap (only canonical, 200 URLs).<\/li>\n\n\n\n<li>Architecture and <a href=\"https:\/\/cronuts.digital\/seo-geo\/linkbuilding\/\">internal linking<\/a>: make sure key pages don&#8217;t depend on internal searches or hidden links.<\/li>\n\n\n\n<li>Avoid orphan pages (with no internal links).<\/li>\n<\/ul>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>Reduce duplicates and noise<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uncontrolled parameters and facets (filters, sort, tracking).<\/li>\n\n\n\n<li>Infinite pagination or calendars that generate thousands of URLs.<\/li>\n\n\n\n<li>Misconfigured canonical that confuses the bot.<\/li>\n<\/ul>\n\n\n\n<ol start=\"5\" class=\"wp-block-list\">\n<li><strong>Validate with data<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In Google Search Console: <strong>indexing<\/strong> reports, <strong>crawl stats<\/strong>, examples of affected URLs.<\/li>\n\n\n\n<li>Server logs: which bots come in, what they crawl, how often and what codes they receive.<\/li>\n\n\n\n<li>A crawl with an SEO tool to reproduce the problem in your architecture.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">How do I optimize crawl budget?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>crawl budget<\/strong> determines how many pages of your site Google crawls in a given period. A site with thousands of low-quality URLs wastes its crawl budget and can leave critical business pages unindexed. Optimize it with these levers:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>1) Prioritize what matters (signals that say &#8220;this deserves crawling&#8221;)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Link strongly from navigation, categories, hubs and high-traffic content.<\/li>\n\n\n\n<li>Use a clear structure (low depth for key pages).<\/li>\n\n\n\n<li>Keep sitemaps clean and segmented (by content type).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>2) Eliminate waste (fewer useless URLs = more budget for the good ones)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Control facets and parameters: restrict indexable combinations and block the rest (depending on the case, with <code>noindex<\/code>, canonicals, rules in <code>robots.txt<\/code> or parameter management).<\/li>\n\n\n\n<li>Avoid generating infinite URLs (indexable internal searches, calendars, filters with no limits).<\/li>\n\n\n\n<li>Fix duplicates from http\/https, www\/non-www, slash\/no-slash, uppercase, etc.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>3) Improve technical health (more real crawling capacity)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Reduce 5xx\/4xx and redirect chains.<\/li>\n\n\n\n<li>Improve server performance and stability (fewer timeouts, better TTFB).<\/li>\n\n\n\n<li>Use caching\/CDN carefully so you don&#8217;t block bots.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>4) Align indexing with the business<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Make sure <a href=\"https:\/\/cronuts.digital\/lead-nurturing\/\">conversion<\/a> landing pages, categories and strategic content are:\n<ul class=\"wp-block-list\">\n<li>200, canonical, linked and present in the sitemap.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Get out of the way what adds nothing: empty tags, worthless pagination, thin content.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Pros and cons of the typical solutions<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Blocking in robots.txt<\/strong>: saves crawling, but doesn&#8217;t &#8220;delete&#8221; already-known URLs and can make it harder for the bot to see canonicals\/content.<\/li>\n\n\n\n<li><strong>Noindex<\/strong>: useful for cleaning up the index, but the URL may keep being crawled for a while; it doesn&#8217;t save as much as a block.<\/li>\n\n\n\n<li><strong>Canonical<\/strong>: helps with duplicates, but the bot still crawls the variants; it&#8217;s more of a &#8220;signal&#8221; than a &#8220;cutoff&#8221;.<\/li>\n\n\n\n<li><strong>Better internal linking + sitemaps<\/strong>: usually the cleanest and most sustainable approach; it takes architecture work.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-funciona-un-crawler-en-la-practica\">How a crawler works in practice<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor.jpg\" alt=\"Servers and network cables in a data center for web crawling\" class=\"wp-image-66398\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-servidor-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>crawler<\/strong> doesn&#8217;t &#8220;read&#8221; a site like a person does. It operates with rules and priorities. In general, it does this:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Discovers URLs<\/strong> (internal links, sitemaps, external links).<\/li>\n\n\n\n<li><strong>Decides whether to visit them<\/strong> (based on signals and limits).<\/li>\n\n\n\n<li><strong>Requests the page from the server<\/strong>.<\/li>\n\n\n\n<li><strong>Collects HTML, resources and signals<\/strong>.<\/li>\n\n\n\n<li><strong>Follows links it finds<\/strong> (if it&#8217;s interested and able).<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">And here comes the uncomfortable part: it doesn&#8217;t crawl everything that exists. It crawls what it can and what it considers worth crawling.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-crawl-budget-el-presupuesto-que-te-pone-el-buscador-aunque-no-lo-veas\">Crawl budget: the allowance the search engine gives you (even if you can&#8217;t see it)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The &#8220;crawl budget&#8221; is understood as the <strong>amount of crawling <\/strong>a search engine devotes to your site in a given period. It depends, above all, on:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>server capacity<\/strong> to respond without errors or slowness,<\/li>\n\n\n\n<li><strong>perceived interest<\/strong> in the site (value of the URLs, freshness, popularity),<\/li>\n\n\n\n<li><strong>internal architecture<\/strong> (how easy it is to reach the relevant pages).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If your site generates thousands of low-value URLs, the <strong>crawler<\/strong> wastes visits on junk and arrives late (or never) at what actually matters.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lo-que-un-crawler-odia-y-lo-que-lo-empuja-a-pasar-de-ti\">What a crawler &#8220;hates&#8221; (and what pushes it to ignore you)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>crawler<\/strong> doesn&#8217;t feel anything, but its behavior makes it clear:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>5xx errors or downtime,<\/li>\n\n\n\n<li>redirect chains,<\/li>\n\n\n\n<li>infinite URLs with parameters,<\/li>\n\n\n\n<li><a href=\"https:\/\/cronuts.digital\/en\/seo-for-ecommerce\/\">duplicate content<\/a> without clear canonicals,<\/li>\n\n\n\n<li>heavy pages that are slow to respond,<\/li>\n\n\n\n<li>calendar traps and poorly handled pagination.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If your site looks like that, you&#8217;re not competing on <a href=\"https:\/\/cronuts.digital\/empresa-de-seo-que-genere-negocio\/\">SEO<\/a>: you&#8217;re competing to survive the crawl.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-senales-tecnicas-que-influyen-en-el-rastreo\">Technical signals that influence crawling<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt.jpg\" alt=\"Developer configuring a robots.txt file to optimize crawling\" class=\"wp-image-66399\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-robots-txt-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-robots-txt-el-portero-no-el-editor\">Robots.txt: the gatekeeper, not the editor<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The robots.txt file is used to <strong>indicate<\/strong> which parts can be crawled. It doesn&#8217;t &#8220;delete&#8221; URLs, it doesn&#8217;t deindex on its own and it doesn&#8217;t fix duplicates. Used well, it helps the <strong>crawler<\/strong> avoid wasting time where it shouldn&#8217;t (for example, internal areas with no organic value).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Used badly, it <strong>blocks key sections<\/strong> and then the doubts arrive: &#8220;why doesn&#8217;t my page show up on Google?&#8221;. Because you didn&#8217;t let it in. Simple.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-meta-robots-el-semaforo-dentro-de-la-pagina\">Meta robots: the traffic light inside the page<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">On a specific page you can say:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>index, follow<\/code> (the usual),<\/li>\n\n\n\n<li><code>noindex<\/code> (it can crawl it, but you don&#8217;t want it indexed),<\/li>\n\n\n\n<li><code>nofollow<\/code> (you don&#8217;t want to pass signal to links, with nuances).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important<\/strong>: if you block via robots.txt, the <strong>crawler<\/strong> can&#8217;t read that page&#8217;s meta robots. In other words, if your goal is <code>noindex<\/code>, the normal thing is to <strong>not block<\/strong> via robots.txt and use meta robots instead.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-sitemap-xml-el-mapa-que-si-conviene-darle\">Sitemap.xml: the map you really should give it<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A sitemap doesn&#8217;t guarantee indexing, but it does improve discovery. The most useful thing is for it to contain:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>canonical URLs,<\/li>\n\n\n\n<li>pages you genuinely want to rank,<\/li>\n\n\n\n<li>last-modified dates (if managed well),<\/li>\n\n\n\n<li>a clean structure by type (services, blog, resources, etc.).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For a <strong>crawler<\/strong>, a well-maintained sitemap is a direct clue: &#8220;this is what I want you to look at&#8221;.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-enlazado-interno-donde-se-ganan-o-se-pierden-semanas\">Internal linking: where you win (or lose) weeks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If an important page is 6 clicks from the home, with confusing menus and broken links, the <strong>crawler<\/strong> will treat it as secondary.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Strong internal linking:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>reduces depth,<\/li>\n\n\n\n<li>reinforces topic clusters,<\/li>\n\n\n\n<li>distributes authority,<\/li>\n\n\n\n<li>speeds up discovery.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">In B2B, this shows up especially on service pages, case studies and conversion resources.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-renderizado-cuando-el-crawler-se-encuentra-con-javascript\">Rendering: when the crawler runs into JavaScript<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript.jpg\" alt=\"Marketing professional analyzing JavaScript rendering problems\" class=\"wp-image-66401\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-javascript-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Many modern sites rely on JavaScript to display content. The problem: crawling and rendering don&#8217;t always go hand in hand.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-que-pasa-si-el-contenido-aparece-tarde\">What happens if content &#8220;appears&#8221; late<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the main text, links or key data are generated afterwards via scripts, the <strong>crawler<\/strong> can:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>see almost-empty HTML,<\/li>\n\n\n\n<li>fail to discover relevant links,<\/li>\n\n\n\n<li>index an incomplete version.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Typical solution: ensure <strong>server-side rendering<\/strong> or <strong>pre-render<\/strong> for critical organic pages, or at least make sure the initial HTML includes the essentials.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-riesgos-comunes-en-b2b\">Common risks in B2B<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>landing pages with content loaded by components that leave no trace in the initial HTML,<\/li>\n\n\n\n<li>catalogs that depend on infinite filters and parameters,<\/li>\n\n\n\n<li>pages that require interaction to display information.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If your site relies on that to &#8220;tell&#8221; what you sell, the <strong>crawler<\/strong> may never find out. And if it doesn&#8217;t find out, you don&#8217;t exist.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-duplicidad-y-canonicas-el-orden-que-el-crawler-necesita\">Duplication and canonicals: the order the crawler needs<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In B2B there&#8217;s duplication by nature: similar services, solutions by sector, repeated listings, pagination. That&#8217;s fine\u2026 if you keep it under control.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-canonical-la-forma-de-decir-esta-es-la-version-buena\">Canonical: the way to say &#8220;this is the good version&#8221;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The canonical tag indicates which is the main URL when there are several that look alike. For a <strong>crawler<\/strong>, this reduces confusion and helps consolidate signals.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical errors:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>canonicals pointing to a URL that doesn&#8217;t return 200,<\/li>\n\n\n\n<li>canonicals that contradict redirects,<\/li>\n\n\n\n<li>canonicals that change based on parameters with no logic.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-parametros-el-agujero-negro-del-rastreo\">Parameters: the black hole of crawling<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Filters, sorting, tracking, pagination\u2026 If every combination creates a crawlable URL, the <strong>crawler<\/strong> can spend all day going in circles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here one decision rules: which parameters have organic value and which should stay out of crawling and\/or indexing. If you don&#8217;t decide it, the search engine does, and it usually decides badly.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-respuesta-del-servidor-el-punto-donde-el-crawler-se-rinde\">Server response: the point where the crawler gives up<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Crawling is also an infrastructure matter:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>high <strong>response time<\/strong>,<\/li>\n\n\n\n<li>error spikes,<\/li>\n\n\n\n<li>aggressive rate limiting,<\/li>\n\n\n\n<li>misconfigured CDN,<\/li>\n\n\n\n<li>unnecessary redirects.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">When a <strong>crawler<\/strong> encounters too many problematic responses, it reduces frequency and prioritizes less. It&#8217;s as if your site were telling it: &#8220;come back another day&#8221;. And that &#8220;another day&#8221; may coincide with your campaign, your launch or your best content.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-codigos-de-estado-que-conviene-tener-bajo-control\">Status codes worth keeping under control<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>200: OK.<\/li>\n\n\n\n<li>301\/302: redirect (fine, if it makes sense and isn&#8217;t chained).<\/li>\n\n\n\n<li>404: not found (acceptable in isolated cases, dangerous if it spikes).<\/li>\n\n\n\n<li>410: intentionally removed (useful for cleanups).<\/li>\n\n\n\n<li>5xx: server error (the worst for crawling).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If your site piles up 5xx errors, the <strong>crawler<\/strong> dials down the intensity. There&#8217;s no epic here: there&#8217;s maintenance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-saber-si-un-crawler-esta-rastreando-lo-que-te-interesa\">How to know if a crawler is crawling what matters to you<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Without any magic promises, there are clear signals for auditing the situation:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-logs-del-servidor-la-verdad-sin-maquillaje\">Server logs: the truth with no makeup<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Logs show:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>which bots visit,<\/li>\n\n\n\n<li>which URLs they hit,<\/li>\n\n\n\n<li>how often,<\/li>\n\n\n\n<li>what response they get,<\/li>\n\n\n\n<li>what time they crawl the most.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This lets you detect whether the <strong>crawler<\/strong> is spending its time on low-value URLs, whether it hits errors or whether it ignores key sections.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-google-search-console-senales-accionables\">Google Search Console: actionable signals<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Search Console helps you see:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>coverage (indexed, excluded, errors),<\/li>\n\n\n\n<li>sitemaps and discovered URLs,<\/li>\n\n\n\n<li>crawling problems,<\/li>\n\n\n\n<li>URL inspection (what the search engine sees and how it processes it).<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The combination of logs + Search Console usually gives a very solid diagnosis.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-problemas-tipicos-con-crawler-que-frenan-el-seo-en-empresas\">Common crawler problems that hold back SEO at companies<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura.jpg\" alt=\"Technical SEO team analyzing website architecture\" class=\"wp-image-66400\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-arquitectura-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-migraciones-sin-control-del-rastreo\">Migrations with no crawl control<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Changing URLs, CMS or architecture without a plan usually produces:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>loss of indexed pages,<\/li>\n\n\n\n<li>badly done redirects,<\/li>\n\n\n\n<li>temporary duplication,<\/li>\n\n\n\n<li>a drop in crawling in key areas.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Here the <strong>crawler<\/strong> behaves like an auditor: if it sees chaos, it lowers its trust.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-contenido-huerfano\">&#8220;Orphan&#8221; content<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Pages that exist, but nobody links to. If they&#8217;re not well linked internally or in the sitemap, the <strong>crawler<\/strong> discovers them late or not at all.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-paginaciones-y-listados-mal-resueltos\">Poorly handled pagination and listings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Resource or product\/service listings with pagination that generates infinite URLs with no priority. Result: the <strong>crawler<\/strong> comes in, gets lost, and leaves you with no coverage exactly where you want it most.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-bloqueos-accidentales\">Accidental blocks<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A robots.txt or a <code>noindex<\/code> tag placed at the wrong moment can take down an entire section. And the worst part: sometimes nobody notices until traffic drops.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-convertir-el-rastreo-en-una-ventaja-competitiva-si-ventaja\">How to turn crawling into a competitive advantage (yes, an advantage)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is about focus: guiding the <strong>crawler<\/strong> toward what sells and steering it away from what distracts.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-arquitectura-pensada-para-seo-no-para-quedar-bonita\">Architecture designed for SEO, not to &#8220;look pretty&#8221;<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>clear hierarchy,<\/li>\n\n\n\n<li>categories that make sense,<\/li>\n\n\n\n<li>internal links that lead to business pages,<\/li>\n\n\n\n<li>removal of indexable junk.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-higiene-de-urls\">URL hygiene<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>consistent canonicals,<\/li>\n\n\n\n<li>clean redirects,<\/li>\n\n\n\n<li>controlled parameters,<\/li>\n\n\n\n<li>pagination with intent.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-contenido-que-merece-ser-rastreado\">Content that deserves to be crawled<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If you publish 30 posts nobody links to that repeat the same thing, the <strong>crawler<\/strong> learns that your site adds little. If you publish less, but better connected and genuinely useful, crawling becomes smarter.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In B2B, this shows when the blog stops being &#8220;filler&#8221; and becomes acquisition support: guides, honest comparisons, use cases, answers to objections.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How does AI affect SEO?<\/h2>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1072\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa.jpg\" alt=\"Professional viewing a generative AI search interface\" class=\"wp-image-66402\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa.jpg 1920w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa-300x168.jpg 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa-1024x572.jpg 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa-768x429.jpg 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/03\/crawler-seo-ia-generativa-1536x858.jpg 1536w\" sizes=\"auto, (max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;re still approaching SEO as if it were all about &#8220;climbing positions on Google and that&#8217;s it&#8221;, you&#8217;re going to be late. <strong><a href=\"https:\/\/developers.google.com\/search\/docs\/appearance\/ai-features?hl=es\" target=\"_blank\" rel=\"noreferrer noopener\">AI<\/a><\/strong> has changed the board because more and more searches don&#8217;t end in ten blue links, but in an answer that&#8217;s already been chewed for you. And that&#8217;s where two acronyms come in that you&#8217;ll be seeing everywhere: <a href=\"\/seo-geo\/geo-motores-generativos\/\"><strong>AEO<\/strong> and <strong>GEO<\/strong><\/a><strong> (<a href=\"https:\/\/cronuts.digital\/generative-engine-optimization\/\">Generative Engine Optimization<\/a>)<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">AEO: when your goal is to be &#8220;the answer&#8221;, not &#8220;a result&#8221;<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>AEO (Answer Engine Optimization)<\/strong> means optimizing for engines that answer, not just for engines that list results. Think about:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>direct answers in search engines,<\/li>\n\n\n\n<li>information panels,<\/li>\n\n\n\n<li>summaries that appear before the user clicks,<\/li>\n\n\n\n<li>frequently asked questions that answer themselves.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">What does this mean in practice? That your content has to make the search engine&#8217;s job easy. If the system quickly understands which questions you answer and with what authority, you have more chances of gaining visibility without depending on the user entering your site.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In B2B this is gold, because many searches are evaluation searches: &#8220;what is&#8221;, &#8220;how it works&#8221;, &#8220;differences between&#8221;, &#8220;best option for&#8221;, &#8220;advantages and risks&#8221;. If your page answers with clarity, structure and context, you become the source the engine uses to build the answer.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">GEO: optimizing for generative engines without losing control of the message<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>GEO (<a href=\"https:\/\/cronuts.digital\/generative-engine-optimization\/\">Generative Engine Optimization<\/a>)<\/strong> goes a step further: it&#8217;s not about appearing in a snippet, but about appearing within the answer generated by an AI search engine.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Here there&#8217;s a mindset shift:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>you used to compete for clicks,<\/li>\n\n\n\n<li>now you compete to &#8220;be cited&#8221;, &#8220;be used&#8221;, &#8220;be a reference&#8221;.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">And yes, this creates real FOMO, because if your competition sneaks in as a source in generated answers and you don&#8217;t, there&#8217;s a part of the market that doesn&#8217;t even see you.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What your content needs to appear in AI search engines<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Generative engines usually build answers from signals similar to those of classic SEO, but with an extra filter: <strong>they need reliable, clear and reusable snippets<\/strong>. To increase your odds:<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Structure that&#8217;s understood at first glance<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Well-planned H2s and H3s.<\/li>\n\n\n\n<li>Direct definitions.<\/li>\n\n\n\n<li>Sections that answer specific questions without beating around the bush.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If a system can extract a paragraph and it makes sense on its own, you&#8217;re in better shape.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Useful context and specificity (no fluff)<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>well-explained terms,<\/li>\n\n\n\n<li>clear relationships between concepts,<\/li>\n\n\n\n<li>steps or decision criteria when appropriate.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">It&#8217;s not about writing more for the sake of it. It&#8217;s about writing so the content &#8220;can be used&#8221; in an answer.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Authority that doesn&#8217;t rely on promises<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">In B2B, AI tends to favor content that looks like it was made by someone who knows what they&#8217;re talking about, not by someone repeating definitions. It shows in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>clarity when explaining,<\/li>\n\n\n\n<li>consistency of language,<\/li>\n\n\n\n<li>absence of contradictions,<\/li>\n\n\n\n<li>depth on key points.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">AEO and GEO don&#8217;t replace SEO: they force it to mature<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/cronuts.digital\/como-funciona-seo\/\">Technical SEO<\/a> and content are still the foundation. What changes is the destination:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>before, the goal was to attract clicks,<\/li>\n\n\n\n<li>now it&#8217;s also to gain presence even if the click doesn&#8217;t come.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">And here comes the <a href=\"https:\/\/cronuts.digital\/estrategia-digital-growth-marketing\/\">strategic<\/a> part: if your brand appears in generated answers, even if the user doesn&#8217;t come in, they&#8217;re seeing you. They&#8217;re putting you on their mental shortlist. That, in B2B, is half the <a href=\"https:\/\/cronuts.digital\/funnel-de-conversion\/\">funnel<\/a> already done.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How this connects with crawling and the crawler<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">An important detail: for an AI search engine to use your content, it first has to <strong>access it<\/strong>. If the <strong>crawler<\/strong> doesn&#8217;t crawl your pages properly, if your key content is hidden behind complex renders or if your URLs get lost in a chaotic architecture, no amount of AEO or GEO will save you.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">AI isn&#8217;t magic: it draws from what it can find, understand and consider trustworthy. If your site isn&#8217;t ready to be crawled and interpreted well, you&#8217;re letting the new visibility slip away right when it&#8217;s being handed out.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-funciona-googlebot\">How Googlebot works<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Here are the different phases:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Phase 1 \u2014 URL discovery<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Googlebot finds new pages and updates from several sources:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Internal links<\/strong>: menus, categories, related-content modules, breadcrumbs. The closer key URLs are to the home (less depth), the sooner they tend to be discovered.<\/li>\n\n\n\n<li><strong>XML sitemaps<\/strong>: they serve as a guide to priority URLs, as long as they&#8217;re well curated (canonical, 200, indexable).<\/li>\n\n\n\n<li><strong>External links<\/strong>: mentions and backlinks help discover and recrawl content, especially if the site has little internal authority or is poorly connected.<\/li>\n\n\n\n<li><strong>Recrawl signals<\/strong>: changes detected via headers, historical update patterns and content popularity.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Points that usually block discovery:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Pages with no internal links (orphans).<\/li>\n\n\n\n<li>Architectures with too many levels, deep pagination or facets that &#8220;cover up&#8221; relevant routes.<\/li>\n\n\n\n<li>Dependence on user actions (internal search, filters without clean URLs) to access content.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Phase 2 \u2014 Crawling and rendering<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Once Googlebot decides to visit a URL, it carries out two processes worth separating:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Crawling (fetch)<\/strong>: it requests the page and receives an HTTP response.\n<ul class=\"wp-block-list\">\n<li>If there are <strong>errors<\/strong> (5xx), <strong>timeouts<\/strong> or too many redirects, crawling degrades and gets postponed.<\/li>\n\n\n\n<li>If there are <strong>blocks<\/strong> (robots, noindex, X-Robots-Tag), it conditions what it can process afterwards.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Rendering<\/strong>: it tries to interpret the page like a browser to see the real content shown to the user.\n<ul class=\"wp-block-list\">\n<li>If the content depends on <strong>JavaScript<\/strong>, Google needs to run resources (JS\/CSS) and wait for the final DOM to be available.<\/li>\n\n\n\n<li>If critical resources are blocked or fail (JS\/CSS\/API), it may &#8220;see&#8221; an incomplete page.<\/li>\n\n\n\n<li>If rendering is heavy (lots of calls, poorly implemented SSR, slow hydration), it can delay processing.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">What Googlebot looks for here (at the technical SEO level):<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Main content and its consistency with the initial HTML.<\/li>\n\n\n\n<li>Internal links it discovers during the render.<\/li>\n\n\n\n<li>Control signals: canonical, hreflang, structured data, meta robots, indexability status.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Phase 3 \u2014 Indexing<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After crawling and, where applicable, rendering, Google decides what to do with that URL:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Canonical selection<\/strong>: it determines which is the main version if there are duplicates or variants (parameters, facets, similar versions). If your canonical is inconsistent, Google may ignore it and choose another.<\/li>\n\n\n\n<li><strong>Quality and uniqueness evaluation<\/strong>: pages with little value, duplicated or mass-generated may be left out of the index or fall into &#8220;discovered but not indexed&#8221; states.<\/li>\n\n\n\n<li><strong>Signal processing<\/strong>: content structure, structured data, language, intent, internal and external links, and other factors that help classify and display the page in results.<\/li>\n\n\n\n<li><strong>Index update<\/strong>: the URL may enter, leave or be updated depending on content changes, authority, performance and crawling behavior.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Important: <strong>crawling doesn&#8217;t equal indexing<\/strong>. A URL can be crawled many times and still not be indexed if Google concludes it adds no value, is duplicate, or has contradictory signals.<\/p>\n\n\n\n<p>According to BrightEdge (2025), organic traffic accounts for <strong>53.3%<\/strong> of all web traffic, cementing its position as the most important acquisition channel.<\/p>\n<h2 class=\"wp-block-heading\" id=\"h-crawlers-de-ia-actuales-gptbot-claudebot-y-perplexitybot\">Current AI crawlers: GPTBot, ClaudeBot and Perplexitybot<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Correctly managing the access of GPTBot, ClaudeBot and PerplexityBot in your robots.txt determines whether your content shows up as a <strong>source<\/strong> in the answers from AI engines. It&#8217;s the new technical SEO.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What each AI crawler does on your site<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>GPTBot (OpenAI)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crawls public pages to <strong>collect content that may contribute to training\/improving models<\/strong>.<\/li>\n\n\n\n<li>It&#8217;s managed through rules in <code>robots.txt<\/code> for that user-agent.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>ClaudeBot (Anthropic)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Crawls public content to <strong>improve the usefulness and safety of the models<\/strong> (potentially for training purposes).<\/li>\n\n\n\n<li>Anthropic states that it operates with several robots and that you can control its access with <code>robots.txt<\/code>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>PerplexityBot (Perplexity)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It&#8217;s geared toward <strong>discovering and indexing sites for Perplexity&#8217;s search results<\/strong> and linking back to the sources.<\/li>\n\n\n\n<li>Perplexity specifies that it is <strong>not<\/strong> used to crawl content intended for foundation models.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>GEO implication (for marketing)<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Allowing these bots can increase the likelihood of your content <strong>appearing and being cited<\/strong> in generative experiences or answer-based search engines, but in exchange you take on more exposure (copyright, paywalls, proprietary content) and possible extra server load. The decision is usually made section by section, not &#8220;all or nothing&#8221;.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">How to manage AI crawler access with robots.txt<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The most direct way is to define rules by <strong>User-agent<\/strong> in <code>robots.txt<\/code>. Typical examples:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\"># Block GPTBot (OpenAI)<br>User-agent: GPTBot<br>Disallow: \/# Block ClaudeBot (Anthropic)<br>User-agent: ClaudeBot<br>Disallow: \/# Block PerplexityBot (Perplexity)<br>User-agent: PerplexityBot<br>Disallow: \/<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;d rather allow only one folder (an &#8220;allowlist&#8221; model), you can do the opposite:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">User-agent: GPTBot<br>Disallow: \/<br>Allow: \/blog\/User-agent: ClaudeBot<br>Disallow: \/<br>Allow: \/blog\/User-agent: PerplexityBot<br>Disallow: \/<br>Allow: \/blog\/<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Practical notes for webmasters:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Perplexity explicitly documents the directives for <strong>PerplexityBot<\/strong> and warns that changes may take some time to take effect.<\/li>\n\n\n\n<li>OpenAI describes its crawlers and control via <code>robots.txt<\/code> for <strong>GPTBot<\/strong>.<\/li>\n\n\n\n<li>Anthropic explains the purpose of <strong>ClaudeBot<\/strong> and access control via <code>robots.txt<\/code>.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">If you&#8217;d like, I&#8217;ll tailor it to your case with a simple policy: <strong>what to allow<\/strong>, <strong>what to block<\/strong> (for example, <code>\/checkout\/<\/code>, <code>\/my-account\/<\/code>, filters with parameters, paid content) and how to validate it with logs.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"442\" src=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2023\/12\/crawler-1024x442.webp\" alt=\"crawler\" class=\"wp-image-63957\" srcset=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2023\/12\/crawler-1024x442.webp 1024w, https:\/\/cronuts.digital\/wp-content\/uploads\/2023\/12\/crawler-300x129.webp 300w, https:\/\/cronuts.digital\/wp-content\/uploads\/2023\/12\/crawler-768x331.webp 768w, https:\/\/cronuts.digital\/wp-content\/uploads\/2023\/12\/crawler.webp 1432w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><br>In internal technical audits at <a href=\"https:\/\/cronuts.digital\/casos-exito-marketing-digital\/\">CRONUTS.DIGITAL<\/a> during 2025, we found that <strong>approx. 55% of projects<\/strong> had <strong>clear signs of crawl budget waste<\/strong> that were holding back indexing: <strong>indexable parameters<\/strong>, <strong>uncontrolled pagination<\/strong> and <strong>duplication from filters<\/strong>, with a recurring pattern of <strong>URLs crawled with no value<\/strong> versus <strong>business URLs<\/strong> that took longer to enter or update in the index. Tools used: <strong><a href=\"https:\/\/www.screamingfrog.co.uk\/seo-spider\/\" target=\"_blank\" rel=\"noreferrer noopener\">Screaming Frog<\/a>  and <a href=\"https:\/\/search.google.com\/search-console\/welcome?hl=es\" target=\"_blank\" rel=\"noreferrer noopener\">Google Search Console<\/a>.<\/strong><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>If your site can&#8217;t be crawled properly, the rest of your SEO is just makeup. Discover what an SEO crawler is, how Googlebot works, what crawl budget is, technical signals and generative AI crawlers.<\/p>\n","protected":false},"author":6,"featured_media":73082,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[40],"tags":[],"class_list":["post-73049","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v23.7 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>SEO Crawler: What It Is and How to Optimize Crawling<\/title>\n<meta name=\"description\" content=\"Learn what an SEO crawler is, how Googlebot works, what crawl budget means, and how to optimize crawling to win B2B organic visibility.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cronuts.digital\/en\/seo-crawler-web-crawlers-impact\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Crawlers in SEO: What They Are, How They Work, and How to Optimize Crawling\" \/>\n<meta property=\"og:description\" content=\"Learn what an SEO crawler is, how Googlebot works, what crawl budget means, and how to optimize crawling to win B2B organic visibility.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cronuts.digital\/en\/seo-crawler-web-crawlers-impact\/\" \/>\n<meta property=\"og:site_name\" content=\"CRONUTS.DIGITAL\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/cronutsdigital\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-12-02T12:15:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-07-15T07:33:40+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/05\/crawler-seo-rastreadores-web-impacto-neumorphic.webp\" \/>\n<meta name=\"author\" content=\"Albert Puig Nav\u00e0s\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:image\" content=\"https:\/\/cronuts.digital\/wp-content\/uploads\/2026\/05\/crawler-seo-rastreadores-web-impacto-neumorphic.webp\" \/>\n<meta name=\"twitter:creator\" content=\"@cronuts_digital\" \/>\n<meta name=\"twitter:site\" content=\"@cronuts_digital\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Albert Puig Nav\u00e0s\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"20 minutes\" \/>\n<script type=\"application\/ld+json\" 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de Growth Marketing en Barcelona. Dise\u00f1amos, ejecutamos y escalamos sistemas de crecimiento digital medibles para PYMEs y empresas B2B.\",\"email\":\"info@cronuts.digital\",\"telephone\":\"+34722525769\",\"legalName\":\"CRONUTS DIGITAL, S.L.\",\"foundingDate\":\"2018\",\"vatID\":\"B67049718\",\"taxID\":\"B67049718\",\"numberOfEmployees\":{\"@type\":\"QuantitativeValue\",\"minValue\":\"15\",\"maxValue\":\"20\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/cronuts.digital\\\/en\\\/#\\\/schema\\\/person\\\/971527c4cdc5d61902fd5996aa335e53\",\"name\":\"Albert Puig Nav\u00e0s\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/583d07f3f1036f58d0e44e873586278b582179a16b27a5b3951504e9ee001c06?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/583d07f3f1036f58d0e44e873586278b582179a16b27a5b3951504e9ee001c06?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/583d07f3f1036f58d0e44e873586278b582179a16b27a5b3951504e9ee001c06?s=96&d=mm&r=g\",\"caption\":\"Albert Puig Nav\u00e0s\"},\"description\":\"Emprendedor digital y estratega de producto con m\u00e1s de una d\u00e9cada de experiencia liderando la transformaci\u00f3n digital. 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