What does Google say about SEO? /
The Crawl & Indexing category compiles all official Google statements regarding how Googlebot discovers, crawls, and indexes web pages. These fundamental processes determine which pages from your website will be included in Google's index and potentially appear in search results. This section addresses critical technical mechanisms: crawl budget management to optimize allocated resources, strategic implementation of robots.txt files to control content access, noindex directives for page exclusion, XML sitemap configuration to enhance discoverability, along with JavaScript rendering challenges and canonical URL implementation. Google's official positions on these topics are essential for SEO professionals as they help avoid technical blocking issues, accelerate new content indexation, and prevent unintentional deindexing. Understanding Google's crawling and indexing processes forms the foundation of any effective search engine optimization strategy, directly impacting organic visibility and SERP performance. Whether troubleshooting indexation problems, optimizing crawl efficiency for large websites, or ensuring proper URL canonicalization, these official guidelines provide authoritative answers to complex technical SEO questions that shape modern web presence and discoverability.
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★★★ Why is Googlebot missing your content loaded by Web Workers?
Googlebot does not handle Web Workers perfectly, particularly asynchronous streams. If a worker loads data asynchronously, it does not work reliably. Google is working to improve this support but reco...
Martin Splitt May 18, 2020
★★★ Can Googlebot really crawl hidden links in a hamburger menu?
If a mobile navigation only appears in the DOM after user interaction (clicking on the hamburger), Googlebot will not see these links. The links must be present in the DOM, even if they are visually h...
Martin Splitt May 18, 2020
★★★ How can you effectively manage 404 errors in a SPA without risking deindexation?
For SPAs with client-side routing, Google recommends three solutions to signal a 404 error: redirect to a server URL with a 404 code, add a noindex tag, or use a soft 404 (automatically detected but l...
Martin Splitt May 18, 2020
★★ Does dynamic rendering really slow down your server or enhance your crawl budget?
Dynamic rendering generally takes more time on the server side because an additional rendering step is added. However, it can save client-side API requests and potentially increase the crawl budget fo...
Martin Splitt May 18, 2020
★★★ Is it true that hidden content in accordions is actually indexed by Google?
Content hidden behind accordions or tabs is indexable by Google as long as it is present in the DOM, even if it is invisible. However, the main content should not be hidden behind user interaction, an...
Martin Splitt May 18, 2020
★★ Should You Serve Lightweight Pages to Bots to Enhance Performance?
It is not recommended to serve bots pages without webfonts to gain performance. The added complexity (bot detection, extra code, potential bugs) far exceeds the minimal benefit. It is better to block ...
Martin Splitt May 18, 2020
★★★ Is dynamic rendering really risk-free for SEO?
Serving identical or similar content to bots without JavaScript is not seen as cloaking. If the content varies slightly, it is dynamic rendering, which is perfectly acceptable according to Google....
Martin Splitt May 18, 2020
★★★ Should You Noindex Your XML Sitemap to Optimize Crawl Budget?
Frédéric Dubut (Bing), followed by John Mueller (Google), explained on Twitter that there is absolutely no problem with setting an XML Sitemap file to "noindex" (via the HTTP header) and that the URLs...
John Mueller May 18, 2020
★★★ Should you always enable loading='lazy' on all your images to boost SEO?
The HTML attribute loading='lazy' for images is strongly recommended for SEO. Img tags remain in the HTML, so Google can crawl and index images normally while speeding up page load for users. It’s a s...
John Mueller May 15, 2020
★★★ Is it true that Googlebot crawls from the USA: how can you avoid the geo-IP cloaking trap?
Googlebot primarily crawls from the USA. If you must block content for US IPs for legal reasons, you must also block Googlebot; otherwise, it's cloaking. The rule: users located at the same location a...
John Mueller May 15, 2020
★★★ Are 500/503 errors lasting a few hours really invisible to your indexing?
Temporary server errors (500, 503) lasting a few hours are managed automatically by Google: systems wait and retry later. These errors are not reported in Search Console and do not affect indexing as ...
John Mueller May 15, 2020
★★ Does Hreflang Really Ensure Accurate Geographic Targeting for Your International Traffic?
Hreflang is not an absolute directive. It is normal to see traffic from foreign countries landing on language versions that are not intended for those countries. Google recommends using a suggestion b...
John Mueller May 15, 2020
★★ Should you disavow ghost backlinks that are only visible in Search Console?
Backlinks from empty pages that are only visible in Search Console and not in other SEO tools are likely due to a technical error (empty for users, full for Googlebot). There is no reason to disavow t...
John Mueller May 15, 2020
★★★ Why does Google not index all your pages despite active crawling?
When Search Console shows a lot of 'Discovered - currently not indexed' or 'Crawled - currently not indexed' pages, it is often because Google's algorithms are not convinced by the overall quality of ...
John Mueller May 15, 2020
★★ Do temporary 404 errors during a migration really kill your SEO?
If pages return temporary 404s during a migration (for a few days) before redirects are set up, Google will recrawl the URLs, see the redirects, and treat them normally. The impact on ranking will be ...
John Mueller May 15, 2020
★★ Should you develop unique content to effectively index various versions of the same service?
If you create separate pages for in-person and online courses (same educational content but different delivery methods), Google will index both pages because the distinction (online/offline) is signif...
John Mueller May 15, 2020
★ Should you encode non-ASCII characters in XML sitemap URLs?
URLs in an XML sitemap can contain non-ASCII characters. You just need to respect the encoding specified in the sitemap specification....
John Mueller May 15, 2020
★★ Are jump links really useless for Google's crawling?
Internal anchor links (with #) are not crawled by Google because they point to the same page. However, Google recognizes them and can sometimes display them in search results to direct the user direct...
John Mueller May 15, 2020
★★ Can you really block Googlebot state by state in the U.S. without breaking everything?
If you need to block certain U.S. states (not the entire country), you can block Googlebot based on the IP geolocation of the state, but it's technically challenging because the state-IP mapping is no...
John Mueller May 15, 2020
★★★ Why does Google only index one version when your country pages are nearly identical?
When two pages have identical or nearly identical content (same language, different countries), Google often chooses one as canonical, even with hreflang. Hreflang allows for swapping the displayed UR...
John Mueller May 15, 2020
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