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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★★★ Do traffic and social signals really influence organic ranking?
Google Ads and social sharing are not considered for search. Traffic in general isn't either. External SEOs have tested traffic to see if it can lead to a page's indexing, and it does not....
John Mueller Feb 19, 2021
★★ Why doesn’t Search Console show all the data from your indexed sitemaps?
In Search Console, you sometimes only see part of the table with sitemap files in a sitemap index. This is more of a reporting issue than an indexing issue. If you were to add the sitemap files indivi...
John Mueller Feb 19, 2021
★★★ What really happens to a site that breaks Google's guidelines?
Sites that do not comply with monetization and organic search guidelines can be removed from the search index and have their ads disabled....
Aurora Morales Feb 17, 2021
★★ Are tags and categories really useless for SEO?
Blog tags and categories have no magical impact on rankings. They're just links that create additional pages (category or tag pages) that can be indexed and allow for discovering other articles throug...
John Mueller Feb 12, 2021
★★★ Can you extend a page's expiration date using unavailable_after?
If Google recrawls a page and detects an updated unavailable_after meta tag with a new date, it will consider this new date. It's not fixed after the first specification. Google treats the page as noi...
John Mueller Feb 12, 2021
★★★ Why does Google only index a tiny fraction of your pages?
Google does not guarantee the indexing of all pages on every website. For most sites, only a small portion of the total content is indexed. It is normal for a site with 600 articles to have only 100 t...
John Mueller Feb 12, 2021
★★★ Is removing URL parameters for Googlebot actually cloaking without a penalty?
Serving pages with URL parameters removed only for Googlebot is technically considered cloaking. However, from a practical perspective, this will not cause manual action by the webspam team, but compl...
John Mueller Feb 12, 2021
★★★ Do you really need a robots.txt file to get indexed by Google?
Having a robots.txt file is totally optional. If no robots.txt file exists, there are no restrictions for robots, and that is a perfectly acceptable setup. The absence of a robots.txt does not affect ...
John Mueller Feb 12, 2021
★★★ Is it true that the History API is really seen as a redirect by Google?
If Google detects that a page is using the History API to change the URL during loading, it classifies this as a redirect and will try to crawl and index the destination URL (the new URL) during the n...
John Mueller Feb 12, 2021
★★★ Should you really block images in robots.txt to exclude them from Google Images?
If you do not want your page images to be displayed in search, a good way to achieve this is by disallowing their crawling in the robots.txt file. Make sure that the appropriate URLs are correctly blo...
John Mueller Feb 10, 2021
★★★ Does Google Really Penalize Duplicate Content?
John Mueller once again indicated during a webmaster hangout that the fact that a website has several similar or identical contents in its structure is in no way a negative relevance criterion for the...
John Mueller Feb 08, 2021
★★ Why do PageSpeed Insights and Googlebot show different results for your site?
PageSpeed Insights is based on Chrome, not Googlebot. Googlebot also uses Chrome for rendering but must obey robots.txt for all embedded content (CSS/JS), unlike PageSpeed Insights. The differences be...
John Mueller Feb 05, 2021
★★★ How does Google group your pages to measure Core Web Vitals?
Google does not have CWV data for every individual page. Pages are grouped according to the available data: at the domain/origin level if there is little data, or by groups of similar pages if there i...
John Mueller Feb 05, 2021
★★★ Should you really use rel=canonical for syndicated content?
For syndicated content, Google recommends using rel=canonical to point to the original source. If that's not possible, Google will try to recognize the syndicated content and rank the original source....
John Mueller Feb 05, 2021
★★★ Is it true that your PageSpeed Insights tests don't accurately reflect what Google really measures regarding Core Web Vitals?
For ranking with Core Web Vitals, Google uses what real users see (field data), not the renders from Googlebot or PageSpeed Insights. Lab tools (controlled environment) provide predictions, not actual...
John Mueller Feb 05, 2021
★★★ Does PageSpeed Insights really reflect what Google sees on your site?
PageSpeed Insights is based on Chrome, not on Googlebot. Googlebot also uses Chrome for rendering but must follow robots.txt for embedded resources (CSS, JS). PageSpeed Insights is not subject to robo...
John Mueller Feb 05, 2021
★★★ Do user comments really count for SEO?
Google considers comments as part of the page content. While recognized as the comments section, they are treated slightly differently. If users find your pages through the comments, deleting those co...
John Mueller Feb 05, 2021
★★★ Do 301 redirects really pass on 100% of PageRank and link signals?
With a 301 redirect, Google groups the old and new URL together and transfers all signals (including links) to the canonical URL, usually the destination of the redirect. To ensure that the new URL is...
John Mueller Feb 05, 2021
★★★ Do user comments really influence your page rankings?
Google considers comments as part of the page content. Google often recognizes that this is a comments section and treats it differently. If users find your pages through comments, removing those comm...
John Mueller Feb 05, 2021
★★★ Do 301 redirects really transfer all ranking signals without any loss?
With a 301 redirect, Google groups the old and new URLs together and transfers all signals (links, etc.) to the canonical URL (usually the destination). It's also necessary to update internal and exte...
John Mueller Feb 05, 2021
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