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.
Quick SEO Quiz

Test your SEO knowledge in 5 questions

Less than a minute. Find out how much you really know about Google search.

🕒 ~1 min 🎯 5 questions
★★★ Why shouldn't you rely on robots.txt to protect your sensitive content?
A robots.txt file is not an appropriate or effective method for blocking sensitive or confidential content. It does not prevent your server from delivering those pages to a browser that requests them....
Lizzi Sassman Sep 09, 2021
★★★ How is Google's new URL Inspection Tool transforming the way we analyze indexed content?
In Search Console, use the URL Inspection Tool and then 'View Crawled Page' to see the actual rendered HTML indexed by Google. It's an alternative to the cache operator, which doesn't work well for Ja...
Martin Splitt Sep 09, 2021
★★★ Does Google Really Need All JavaScript Features to Work for Proper Rendering?
Martin Splitt explained on Twitter that for Google's rendering phase of your web pages to work well, it's not necessary for all features to be active as they would be for an end user, such as the burg...
Martin Splitt Sep 06, 2021
★★★ Can Changing Your IP Address Hurt Your Site's SEO Rankings?
John Mueller explained on Reddit that if you change your server's IP address, it will not affect your page rankings. However, it may impact the site's crawlability by bots, while the search engine's c...
John Mueller Sep 06, 2021
★★ Why is a sitemap crucial even for small sites?
Submitting a sitemap file is not mandatory, especially for very small sites, but it is highly recommended as it facilitates the discovery of new and updated content by Google....
John Mueller Sep 03, 2021
★★ Does using multiple CMS really affect your SEO?
Using multiple CMS on the same site does not affect SEO. Google does not take the type of CMS into account for ranking or indexing. Any potential issues are related to the CMS itself, not to having se...
John Mueller Sep 03, 2021
★★★ Do Mobile and Desktop Versions Really Need Identical Content for Mobile First Indexing?
John Mueller explained on Twitter that, to be acceptable in the Mobile First index, the desktop and mobile versions of a page do not need to offer exactly the same content, but must however "fulfill t...
John Mueller Aug 30, 2021
★★ Do blocked pages by robots.txt really impact your site's overall SEO quality?
Indexed but blocked pages by robots.txt are not considered for the overall quality of the site. Google does not know their content, and they do not appear in search results....
John Mueller Aug 28, 2021
★★★ How does window.history.pushState affect SEO indexing?
When window.history.pushState occurs during page loading, Google treats it as a redirect. The modified URL is the one Google considers for indexing. However, server-side redirection remains preferable...
John Mueller Aug 28, 2021
★★★ Do old 404 errors still influence your SEO rankings?
404 errors on old URLs that Google is still trying to crawl do not affect ranking at all. It's perfectly normal for a site to generate many 404 errors on URLs that no longer exist....
John Mueller Aug 28, 2021
★★★ Is it true that Google only crawls from a single location?
Google typically crawls a site from a single geographic location, not from multiple data centers simultaneously. If content is served based on location, Google's bot may not see all the content availa...
John Mueller Aug 28, 2021
★★★ Does Google Really Keep Testing Your Old 301 Redirects for Years?
John Mueller explained on Twitter that when a redirect is set up, the search engine will try for years, again and again, to test them to see if they are still in place: "We have a long memory. I think...
John Mueller Aug 23, 2021
★★★ Why Does Google Only Index 80% of Your Website's Pages?
John Mueller explained during a webmaster hangout that it was common for Google to index - as an example - only 80% of a website's content (and therefore refuse to index 20%). This can stem from the o...
John Mueller Aug 23, 2021
★★★ Why does Google enforce strict rules on geo-blocking and crawling?
Googlebot must be treated like a user from the same region. If you block users from the U.S., you must also block Googlebot that crawls from the United States. This is a Google policy regarding cloaki...
John Mueller Aug 20, 2021
★★★ Why do URLs with or without a trailing slash matter so much in SEO?
Google treats URLs with a trailing slash (/) and without a trailing slash as two distinct URLs and indexes them separately. It is crucial to consistently use the same variant across all internal links...
John Mueller Aug 20, 2021
★★★ Is it true that links to a noindex page can lose their SEO value?
Noindex pages can initially pass link signals, but when the noindex status becomes permanent, Google eventually ignores them completely, and links pointing to these pages no longer convey any value. T...
John Mueller Aug 20, 2021
★★★ How does Google's new removal tool transform your SEO strategy?
The temporary removal tool in Search Console simply hides pages in search results for 6 months, without altering indexing or crawling. Google continues to crawl and reindex the page normally during th...
John Mueller Aug 20, 2021
★★ Why Doesn't Google Index All of Your Pages?
For most websites, Google never indexes 100% of all the pages. There is always a certain proportion of pages that are not indexed, which is normal in the functioning of Google....
John Mueller Aug 20, 2021
★★ How does the disavow file truly impact your link profile?
When a disavow file is deleted or modified, Google takes it into account immediately, but the effect unfolds gradually as the affected links are recrawled. It is better to update the file than to dele...
John Mueller Aug 20, 2021
★★★ Do temporarily removed pages really influence the overall SEO quality of a website?
Pages hidden via the temporary removal tool remain indexed and are still taken into account in the overall quality assessment of the website. If they represent a significant portion of the site, they ...
John Mueller Aug 20, 2021
🔔

Get real-time analysis of the latest Google SEO declarations

Be the first to know every time a new official Google statement drops — with full expert analysis.

No spam. Unsubscribe in one click.