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 canonical and noindex tags in HTTP headers really work the same way as those in HTML?
The rel=canonical and noindex tags in the HTTP header are treated as if they were tags in the HTML header and must be in the static HTML to be effective....
John Mueller May 29, 2018
★★★ Should you really treat Googlebot like an average visitor in your A/B tests?
Google recommends treating Googlebot like an average user during A/B testing (including in the test variants), while noting that Googlebot does not return cookies between visits....
John Mueller May 29, 2018
★★★ Can You Really Use a Single robots.txt File to Declare Sitemaps for Multiple Different Domains?
Always John Mueller and always Twitter with the fact that a robots.txt file that would be identical and shared by several websites contains the addresses of several XML Sitemap files, one for each sit...
John Mueller May 28, 2018
★★★ Does Fast Server Response Time Really Boost the Number of Pages Google Crawls?
John Mueller indicated on Twitter that the faster a website's response time, the more pages search engine bots could crawl: "The faster we can crawl, the more we can crawl"......
John Mueller May 21, 2018
★★★ Why are image redirects critical when migrating to a new CDN?
When migrating images to a new CDN with different URLs, ensure that you set up redirects from old URLs to new ones. This is crucial because Googlebot does not crawl images as often as pages, and this ...
John Mueller May 18, 2018
★★★ Should you really favor the 410 code over the 404 for faster deindexing?
For Google, error codes 404 and 410 are treated similarly, as both mean that the URL no longer exists. However, a 410 status may remove content from the index a bit faster than a 404....
John Mueller May 18, 2018
★★★ Do hreflang tags really need to point to the canonicals of paged pages?
Hreflang tags must point to the canonical versions of pages, even for paginated pages. This means that if a paginated page has a different canonical version, the hreflang links should point to that ca...
John Mueller May 18, 2018
★★★ Can GDPR modals actually hinder the indexing of your content?
If a GDPR-related legal modal obscures the content of a page, it might be indexed instead of the actual content. To prevent this, overlay the modal using JavaScript to allow Google to index the underl...
John Mueller May 18, 2018
★★★ Is the URL Parameters Tool Really Effective in Optimizing Crawl Budget?
When it comes to managing millions of pages with different URL parameters, using the URL Parameters Tool to inform Google about which parameters can be ignored is a good solution. This helps Google un...
John Mueller May 18, 2018
★★★ Have links really lost their importance for ranking?
Links play an important role in indexing even though their influence is sometimes overestimated. However, they are unlikely to disappear overnight in their use by search engines....
Google May 17, 2018
★★★ Should you really use dynamic rendering to index your JavaScript pages?
Dynamic rendering allows you to show a HTML version of a page to Google bots to facilitate the indexing of JavaScript sites. This can help speed up the indexing process but is not necessary....
Google May 17, 2018
★★★ Do links to a canonicalized page lose their SEO value?
When links are directed to a page, and that page uses a canonical tag pointing to another page, the value of the links is transferred to the designated canonical page....
John Mueller May 17, 2018
★★ Does Google really index raw JSON responses?
JSON content can be indexed if publicly accessible, but it usually does not show up in standard search results....
Google May 17, 2018
★★★ Does mobile-first indexing mean that Google punishes sites that are not optimized for mobile?
Mobile-first indexing refers to indexing the mobile version of a site, no matter its degree of mobile optimization. Identical content on desktop and mobile does not lead to differences in indexing....
Google May 17, 2018
★★★ How does Google really index AMP sites with a mobile-first approach?
For sites using AMP as the primary version (canonical AMP), it is directly utilized for mobile-first indexing. This means Google relies on this version for ranking....
Google May 17, 2018
★★★ Can you block MP4 video files in robots.txt without risking SEO penalties?
It is acceptable to block video resources such as MP4 files in the robots.txt file. This will not affect your ranking in web search, but the videos will not appear in Google’s video search....
John Mueller May 17, 2018
★★★ Does the canonical tag really override all your product variations?
Using a canonical tag means asking Google to consider a specific page as the main version. If you have product variations, make sure that all important information about the variations is retained on ...
John Mueller May 17, 2018
★★ Why does Search Console show some resources as blocked when they're supposed to be accessible?
If resources appear blocked in Search Console, it may be due to temporary unavailability of the robots.txt files or server overload making certain resources inaccessible....
Google May 17, 2018
★★★ How does Google really choose the canonical version of a page when faced with duplicate content?
The canonical tag is used to indicate which version of a page should be indexed when multiple pages have similar content. Google examines several signals to determine which page should be canonically ...
Google May 17, 2018
★★ Are dynamic URLs with parameters really penalized by Google?
Dynamic URLs with parameters are not inherently disadvantaged in terms of indexing. However, it is advisable to check that Google can easily crawl these URLs and that the content is rendered accessibl...
Google May 17, 2018
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