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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★★★ Should you really put empty user profile pages on no-index?
It is generally unnecessary to put no-index on underfilled user profile pages. Google automatically focuses on the important parts of the site. No-index is only useful if these pages are used for spam...
John Mueller Jul 24, 2020
★★ Should you really nofollow your menu links to optimize crawling?
To prevent Google from following internal menu links, the nofollow attribute can be used. However, in most cases, it is unnecessary to hide these links. If a page should not be indexed, it's better to...
John Mueller Jul 24, 2020
★★★ Could unmoderated comments trigger SafeSearch and penalize your entire site?
Google tries to isolate comments from main content, but if a site publishes unmoderated adult or spam comments, it can be globally treated by SafeSearch or penalized. The webmaster must moderate or no...
John Mueller Jul 24, 2020
★★ Does the URL Inspection Tool really guarantee your pages will be indexed?
Google does not have any known crawling issues with the URL Inspection Tool, but submitting a URL does not imply automatic indexing. New sites without strong signals may not be indexed immediately; it...
John Mueller Jul 24, 2020
★★ Is it true that using nofollow on internal menu links can control PageRank?
To prevent signal transfer to certain internal menu links, using the nofollow attribute is appropriate. However, in most cases, it is not necessary to hide these links; a no-index on the destination p...
John Mueller Jul 24, 2020
★★★ Do YouTube two-click embeds really hurt video SEO?
YouTube video embeds with placeholder (two-click for privacy) do not inhibit indexing if the VideoObject schema is used. Google can thus recognize the video and display it in results even without seei...
John Mueller Jul 24, 2020
★★ Why does your site still receive 40% of desktop crawls after transitioning to mobile-first indexing?
Even after moving to mobile-first indexing, a site can receive 40% desktop crawls and 60% mobile. This depends on the type of content (e.g., Google Shopping, AdWords Landing Page Check may use the des...
John Mueller Jul 24, 2020
★★★ Is it really possible to show different interstitials based on traffic source without SEO risk?
Google devalues mobile pages displaying intrusive full-screen interstitials. Showing a partial interstitial (e.g., lower third) to organic visitors while displaying a full screen to other channels is ...
John Mueller Jul 24, 2020
★★★ Should you really apply noindex to all user profiles suspected of spam?
For forums with user profiles exploited for link building, apply nofollow to links and noindex to suspicious profiles. Google can learn to ignore all links from a domain if too much spam is detected, ...
John Mueller Jul 24, 2020
★★ Is it really necessary to duplicate the text of infographics for Google to index them?
Google treats infographics as standard images. If important text is embedded within the image, it is recommended to also provide this content in textual form in an article or post to ensure better ind...
John Mueller Jul 24, 2020
★★ Do image metadata really influence rankings in Google Images?
Google indexes certain image metadata, primarily to display licensing and copyright information in Google Images. This metadata does not constitute a ranking factor but is useful for providing legal i...
John Mueller Jul 24, 2020
★★★ Are Multiple Redirect Chains Really Hurting Your SEO?
Redirect chains (http → www → https) do not pose a problem. Googlebot follows up to 5 redirects in a day and then continues to the next ones. Once the final URLs are known, Google focuses on them. The...
John Mueller Jul 24, 2020
★★★ Do you really need to transcribe your podcasts to rank on Google?
For audio content (podcasts, etc.) to be indexed and ranked in web search, a text transcription must be provided. Google does not yet perform automatic voice recognition to index raw audio. Transcript...
John Mueller Jul 24, 2020
★★★ Is it true that you don’t need to mark up your entities for them to appear in Google's rich results?
For an entity to appear in rich results (e.g., mobile games), Google must recognize it as such across the entire web, not just on one site. No special markup is required; Google identifies entities by...
John Mueller Jul 24, 2020
★★ Why does your favicon take months to get indexed on Google?
A favicon can take several months to appear in search results, particularly if the site uses subdomains for each language instead of being indexed at the root. Google recommends reporting persistent c...
John Mueller Jul 24, 2020
★★★ Should you really create your robots.txt from scratch or can you take inspiration from a competitor?
You shouldn't simply reuse someone else's robots.txt file assuming it will work for your site. Instead, think about the parts of your site that you really don't want crawled, and block only those....
John Mueller Jul 20, 2020
★★ Should you really block server configuration files in robots.txt?
Configuration files such as PHP.ini or .htaccess are not accessible from the outside by default. They are secured or located in a special place. If no one can access them, Googlebot cannot either. The...
John Mueller Jul 20, 2020
★★★ Should You Block 404 Error Pages in Your Robots.txt File?
John Mueller indicated on Twitter that it would be a very bad idea to block pages that return 404 errors from search engine crawling, adding that Googlebot attempts to crawl billions of URLs that retu...
John Mueller Jul 20, 2020
★★★ Should you really unblock all CSS files in robots.txt to avoid a Google penalty?
Google must be able to access CSS files to render pages correctly. This is essential for determining whether a page is mobile-friendly. Although CSS files are generally not indexed on their own, Googl...
John Mueller Jul 20, 2020
★★★ Does the crawl budget truly impact the rendering phase of your JavaScript pages?
The crawl budget affects not only the initial crawl but also the rendering, as Google needs to fetch additional resources (CSS, JavaScript, API). A poor cache can force Google to continuously re-downl...
Martin Splitt Jul 14, 2020
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