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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★★★ Does server response time really slow down Google's crawl more than rendering speed?
Server response time is critical for crawling. Rendering speed (user-side performance aspect) is less important for crawling, but server response time technically slows Google down during the crawl....
John Mueller Feb 19, 2021
★★★ 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 does Google display the canonical URL instead of the local URL in Search Console?
In Search Console, Google primarily reports canonical URLs. In the performance and index coverage report, Google simplifies and shows the canonical URL, even if the local URL is displayed to users thr...
John Mueller Feb 19, 2021
★★★ Are server errors really killing your crawl budget?
When Google crawls a certain number of pages per day and the number of server errors increases, Google reduces the crawl, assuming it is crawling too aggressively. Google aims to leave capacity for ac...
John Mueller Feb 19, 2021
★★★ Does the length of an article really influence its Google ranking?
For web search, Google doesn't care about the length of articles. Don't focus so much on the length of the article, but rather on whether you want it to be indexed or not. Short articles are perfectly...
John Mueller Feb 19, 2021
★★★ How does Google really handle canonicalization and hreflang on multilingual sites?
Google recognizes identical content across different country versions, clusters it, and chooses a canonical URL for indexing. With correct hreflang, Google displays the appropriate local URL in the re...
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
★★ Should you really index fewer pages to prevent thin content?
Consider whether you really need all these individual pages to be indexed. Perhaps you should have something more comprehensive about the content itself as your indexed element, rather than individual...
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
★★★ 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
★★ 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
★★★ 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
★★★ 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
★★★ 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
★★★ 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
★★★ 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
★★★ Does rel=canonical to the source really protect syndicated content?
For syndicated content, Google recommends using rel=canonical to the original source. If not possible, Google will attempt to recognize the syndicated content. The original site will generally be favo...
John Mueller Feb 05, 2021
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