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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★★ Why does the Search Console show inconsistent indexing data?
Different metrics in the Search Console can show discrepancies due to the mismatch between submitted URLs and indexed URLs. Variations like URLs with or without a trailing slash can pose a problem....
John Mueller Sep 21, 2017
★★★ Does noindex and follow really allow links to pass PageRank?
Using the noindex tag with follow means that a page should not be indexed, but the links on that page should be followed and PageRank should be passed. However, if the page is not indexed, the links c...
John Mueller Sep 21, 2017
★★★ Does duplicate content really hurt your Google indexing?
Google tries to determine where the content was first seen and chooses the most relevant version for SERPs. If the content is duplicated elsewhere, the other site isn’t necessarily penalized....
John Mueller Sep 21, 2017
★★★ Does improperly implemented structured data really hinder your site's indexing?
When a website's structured data is not well interpreted, it is advised to ensure that markups are correctly applied only to relevant pages and to fix errors reported in the Search Console....
John Mueller Sep 21, 2017
★★★ Should you really declare your AMP as the official mobile version for mobile-first indexing?
If a site has only an AMP version without a mobile version, it is recommended to declare AMP as the official mobile version. This ensures that mobile-first indexing correctly uses the mobile version o...
John Mueller Sep 19, 2017
★★★ Does applying noindex to weak pages truly enhance your site's quality perception?
Adding noindex to low-quality pages can help ensure that the site is perceived as providing high-quality content. It does not improve a Panda score but ensures that only useful pages are indexed by Go...
John Mueller Sep 19, 2017
★★★ Do you really need to optimize your XML sitemap loading speed?
John Mueller explained on Twitter that an XML Sitemap file doesn't need to load faster or slower, as long as a timeout doesn't occur, of course. But the loading time of this file isn't taken into acco...
John Mueller Sep 18, 2017
★★★ How Does Google Actually Detect Duplicate Content During Indexing?
Gary Illyes provided some insights on Twitter about how Google handles duplicate content phenomena: it's done through page comparison (not based on keyword analysis), the analysis is performed during ...
Gary Illyes Sep 11, 2017
★★ Does Noindexing 50% of Your Pages Actually Hurt Your SEO Rankings?
A Googler (Aaseesh Marina) indicated on a forum that noindexing a large portion of a site's pages (for example 50%) had no negative impact on the other pages that were indexed....
Google Sep 11, 2017
★★★ How can you prevent indexing collapse during a website migration?
During a migration, redirect all old pages to the new site and let Google crawl those redirects. Avoid frequently switching between old and new content, as this complicates indexing....
John Mueller Sep 08, 2017
★★★ Is the canonical tag truly enough to solve all your duplicate content issues?
If you have two pages with the same content, they may be considered duplicates. Google might opt for the simplest version to index. Use the canonical tag to indicate your preferred version....
John Mueller Sep 08, 2017
★★★ Should you really canonicalize paginated pages to point to the first page?
For paginated content, if the other pages do not need to be indexed, you can use the canonical tag to point to the first page. Otherwise, make sure that the following pages are indexable....
John Mueller Sep 08, 2017
★★★ Is it really necessary to reindex the entire site after a URL change?
Any URL change, such as removing .html extensions, necessitates a full site reindexing by Google....
John Mueller Sep 07, 2017
★★★ Can lazy loading of images hinder their indexing by Google?
If images are dynamically loaded through events, Googlebot may not see them, which can impact their indexing....
John Mueller Sep 07, 2017
★★★ Is Googlebot over-crawling your CSS and JS resources?
If Googlebot is accessing CSS/JS resources too frequently, report it through Search Console to address potential caching issues....
John Mueller Sep 07, 2017
★★★ Why does Googlebot ignore your cookies and how does it affect your multilingual strategy?
Googlebot does not handle cookies. Do not rely on cookies to redirect users to a specific language version of a page....
John Mueller Sep 07, 2017
★★★ Can the unavailable_after tag really control how long your content remains in Google's index?
The unavailable_after tag can be used for expired content. Google removes this content from the index on the specified date....
John Mueller Sep 07, 2017
★★★ Can .eu domains really target multiple countries without SEO penalties?
The .eu domains can be used for multiple geographic targets. Google recommends not to frequently change the geographic settings to avoid reindexing delays....
John Mueller Sep 07, 2017
★★★ Why should you choose a 301 over a 307 when migrating to HTTPS?
When switching to HTTPS, 307 redirects are typically handled by the browser and do not affect Google's crawls. Use 301 for server-side redirects....
John Mueller Sep 07, 2017
★★★ Should you really automate language redirections for your multilingual website?
You can automatically redirect users based on language or allow them to choose from a selection page. Ensure that language versions remain crawlable....
John Mueller Sep 07, 2017
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