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 an XML Sitemap Really Essential for Your Google Rankings?
Gary Illyes (Google) indicated on Twitter that XML Sitemap files still remain the second source of URL discovery for the search engine today (he had already said this in 2014, so the situation has not...
Gary Illyes Sep 02, 2019
★★★ Does the Google Sandbox Really Exist or Is It Just an SEO Myth?
John Mueller himself indicated on Twitter that the notion of the Sandbox (the idea that a site, when it is created, is put "in quarantine" by the search engine before achieving the positions it aspire...
John Mueller Aug 26, 2019
★★★ Is your website still not switched to mobile-first indexing?
Google has moved a significant part of the web to mobile-first indexing. If your site hasn't been migrated, it may be due to an automated assessment from the systems indicating that it is not yet read...
John Mueller Aug 23, 2019
★★ Should you really include a GTIN in your product structured data?
Not providing a global product identifier does not prevent the indexing of your structured data, but including these identifiers helps group the product if multiple sellers are involved....
John Mueller Aug 23, 2019
★★ Why does blocking a page with robots.txt prevent Google from seeing your noindex tag?
Using the URL Removal Tool does not change how pages are crawled or indexed. If a page is blocked by robots.txt, we will not see the noindex, so it is important to choose one method or the other....
John Mueller Aug 23, 2019
★★★ Do stock images really hurt your Google Images ranking?
New photos taken by a photographer and stock images are considered distinct images by Google Images, and each is indexed separately....
John Mueller Aug 23, 2019
★★★ Is Two-Wave JavaScript Indexing Really Disappearing?
The need for two waves of indexing for JavaScript sites is decreasing, with Gmail leveraging the latest version of Chrome, making indexing more efficient....
Martin Splitt Aug 23, 2019
★★ Why does Google Search Console intentionally block the indexing of JavaScript, CSS, and image files?
Google Search Console intentionally blocks the indexing of non-HTML files like images, JavaScript files, and CSS through the URL Inspection tool, so that they do not appear in search results....
John Mueller Aug 22, 2019
★★★ How does Google decide which version of duplicated content to display in search results?
When publishing articles on multiple domains, Google first indexes the different versions and then chooses one version to display in the search results. Using a canonical tag to designate a primary ve...
John Mueller Aug 22, 2019
★★ Can loading times really limit your pages' indexing?
Google is flexible with page loading times. While no strict limit is imposed, excessively long response times can reduce the number of crawled pages....
John Mueller Aug 22, 2019
★★★ Is it possible to refuse mobile-first indexing to protect your desktop site?
Google does not plan to provide an option to choose or refuse mobile-first indexing. The long-term goal is to move all sites to this type of indexing....
John Mueller Aug 21, 2019
★★★ How does Google really assess your site's mobile compatibility before switching to mobile-first?
Google evaluates sites' readiness for mobile-first indexing by comparing mobile and desktop versions, ensuring that all content, including structured data and images, is accessible....
John Mueller Aug 21, 2019
★★★ Does mobile-first indexing really work without a mobile version?
Mobile-first indexing is independent of mobile compatibility. Even sites without a mobile version can be properly indexed by the mobile Googlebot....
John Mueller Aug 21, 2019
★★★ Do you really need a robots.txt file to control your site's indexing?
The robots.txt file allows you to set rules for controlling indexing bots' access to different parts of a website. While not essential, its absence means all pages can be crawled by default....
Google Aug 16, 2019
★★★ Should you really allow Googlebot to access your CSS and JavaScript?
Avoid blocking resources like CSS or JavaScript files in your robots.txt file, as this can prevent search engines from properly rendering the website....
Google Aug 16, 2019
★★★ How can you effectively verify your robots.txt file to avoid crawl errors?
To verify your site's robots.txt file, you can do so directly via your browser by accessing the dedicated URL or use the robots.txt testing tool in Google Search Console....
Google Aug 16, 2019
★★★ Should you really block your admin pages in robots.txt to save on crawl budget?
It is wise to use robots.txt to restrict the indexing of unnecessary pages such as admin or calendar pages, in order to decrease unnecessary traffic to the server....
Google Aug 16, 2019
★★★ Why isn't robots.txt a reliable security tool for your site?
The robots.txt file should not be used to secure sensitive pages. Pages that must not be publicly accessible must be protected by security systems such as password authentication....
Google Aug 16, 2019
★★★ Are JavaScript Redirects Really Safe for Your SEO?
Third episode of the #AskGoogleWebmasters videos, which this time addresses the question of JavaScript redirects. John Mueller explains that Googlebot understands JS redirects well during its crawls a...
John Mueller Aug 12, 2019
★★★ Does Google Really Index Parts of Pages or Always the Entire Content?
The same John Mueller indicated on Twitter that Google always indexes a page in its entirety and never "bits" or parts of HTML code....
John Mueller Aug 12, 2019
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