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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★★★ Is your robots.txt blocking the indexing of your strategic pages without you knowing it?
Make sure your robots.txt file isn’t accidentally blocking pages you want indexed by Google. If a file or directory is blocked by robots.txt, it won’t be crawled, and this can affect the visibility of...
Google Jan 17, 2017
★★★ How Does Google Warn Webmasters About Mobile First Index Risks?
John Mueller indicated in a hangout that Google will send messages via Search Console to webmasters who own sites that could be impacted in one way or another (and especially negatively, for example f...
John Mueller Jan 16, 2017
★★★ Should You Really Resubmit Already Indexed URLs in Search Console Regularly?
John Mueller indicated in a hangout that it's not necessary to resubmit via Search Console a URL that is already indexed by Google. Well, obviously... :). This was in response to a question from a web...
John Mueller Jan 16, 2017
★★★ Should You Modify Your Canonical Tags When Switching to Mobile First Index?
As long as Mobile First indexing is being tested by Google, there is no reason to change the "canonical" tags if you have a dedicated mobile site whose pages point to their desktop equivalents. John M...
John Mueller Jan 16, 2017
★★★ Do errors in my XML Sitemap actually penalize the indexing of my other pages?
John Mueller indicated on Twitter that the fact that certain URLs are erroneous or return errors when reading an XML Sitemap file does not affect the reading and processing of other URLs (as on Bing f...
John Mueller Jan 16, 2017
★★ Is HTML5 canvas content indexable by Google?
Content displayed via HTML5 canvas, like musical scores, is generally not indexable by Google. If the main content is not indexed, it may be necessary to add indexable text, such as titles or descript...
John Mueller Jan 13, 2017
★★★ Should you really hide content behind a paywall to get indexed by Google?
Google recommends that when certain content is accessible only after a certain number of free views, the 'First Click Free' model should be used. With this model, you can allow users to read the conte...
John Mueller Jan 13, 2017
★★★ Does mobile content really dictate desktop rankings since Mobile-First Indexing?
With mobile-first indexing, Google will use the content from the mobile version of a page to index and determine rankings for both desktop and mobile. This means that mobile content must be as complet...
John Mueller Jan 13, 2017
★★★ Does Google really index cookie-based personalized content?
Google indexes pages based on the URL and does not take into account referrers or cookies to personalize the content seen during indexing. Personalized content based on these methods will not be index...
John Mueller Jan 13, 2017
★★★ Should you block Googlebot from accessing certain sections of your site?
It is acceptable to block Googlebot's access to certain sensitive sections of your site, such as user accounts or wishlists, via the robots.txt file....
John Mueller Jan 13, 2017
★★★ What happens when a ccTLD disappears from Google's index?
When managing multi-domain sites with multiple ccTLDs, Google recommends posting issues in the help forum when a site disappears from the index. Contributors can often identify and resolve common prob...
John Mueller Jan 13, 2017
★★★ Will Google finally index hidden mobile content completely?
Content that is not visible on mobile pages, such as that found in tabs or sliders, will be indexed in the new Mobile-First index. This is a change from previous practices where this type of content c...
John Mueller Jan 12, 2017
★★★ Are dynamic URLs really as effective as static URLs for SEO?
Google views dynamic and static URLs as having a similar impact on rankings. However, it is often easier to avoid crawling errors by using dynamic parameters, especially if the system isn’t properly c...
John Mueller Jan 12, 2017
★★★ Should you really create a sitemap for old HTTP URLs when migrating to HTTPS?
It is advisable to create a Sitemap file for old URLs during an HTTP to HTTPS migration to speed up the transfer of SEO signals to the new URLs....
John Mueller Jan 12, 2017
★★ Does a 410 code really remove your pages faster than a 404?
URLs that return an HTTP 410 status can take from a few days to several months to be completely removed from Google's index, depending on the crawling frequency....
John Mueller Jan 12, 2017
★★★ Does the Mobile-First Index really make mobile SEO optimization essential?
With the Mobile-First Index, it is now crucial to ensure that mobile sites are well-optimized and include all essential SEO elements, such as structured data and alt tags for images....
John Mueller Jan 12, 2017
★★★ Do 404 errors really hurt your organic search rankings?
Having 404 errors on a site does not pose a problem for ranking. It is expected behavior when pages are intentionally removed. The URLs marked as 404 do not negatively affect the site but are removed ...
John Mueller Jan 12, 2017
★★★ Should you really pay attention to the case and syntax of noindex and nofollow tags?
Noindex and nofollow tags can be uppercase or lowercase and separated by a comma or not, with no difference in performance. Positive tags like index or follow do not need to be used as they are the de...
John Mueller Jan 10, 2017
★★★ Is mobile-first indexing really reshaping your SEO strategy?
Google plans to use a site's mobile version for crawling, indexing, and ranking. Sites must ensure that their content, internal links, and other factors are well optimized for mobile....
John Mueller Jan 10, 2017
★★ Will Mobile PageSpeed Really Be Ignored as a Ranking Factor with Mobile First Indexing?
John Mueller indicated that when Mobile First indexing launches in a few months, a page's mobile PageSpeed score will not be considered as a relevance criterion, at least initially (currently it's the...
John Mueller Jan 09, 2017
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