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.
Quick SEO Quiz

Test your SEO knowledge in 5 questions

Less than a minute. Find out how much you really know about Google search.

🕒 ~1 min 🎯 5 questions
★★★ Is the combination of canonical and hreflang a common trap for multilingual sites?
Use hreflang to accurately target the language or regional variants of your pages. However, be meticulous in implementation to ensure effectiveness and avoid URL mapping errors....
John Mueller Jun 02, 2015
★★★ Is Fetch as Google really the fastest way to get your pages indexed?
The quickest way to get your pages indexed is to use Fetch as Google in Search Console and submit to the indexing engine....
John Mueller Jun 02, 2015
★★★ PageSpeed Insights vs Mobile-Friendly Test: Why does Google use two different tools?
PageSpeed Insights and the mobile-friendly test have distinct objectives: the former analyzes loading speed from the user's perspective, while the latter simulates Googlebot's view to check mobile com...
Google May 28, 2015
★★ Do you really need a separate mobile sitemap when you have distinct URLs?
It is not necessary to have a specific XML sitemap for mobile sites with distinct URLs, as long as the relationship between the mobile and desktop versions is properly declared using alternate tags....
Google May 28, 2015
★★ Are mobile sitemaps still essential for your indexing?
For sites with distinct mobile URLs, ensure that these are verified in webmaster tools and properly configured in mobile sitemaps....
Google May 22, 2015
★★★ Hreflang vs. Canonical: Which Tag is Best for Managing Your International Versions?
When targeting different geographic regions with similar content, hreflang tags are preferable to canonical tags for indicating the language and regional versions of the pages....
Google May 22, 2015
★★ Does Android app indexing really affect Google search rankings?
Google uses app indexing as a ranking signal for Android. Even when offline, app installation suggestions may appear based on searches....
Google May 22, 2015
★★ Does the 'unavailable after' meta tag really remove a page from Google's index on a specific date?
The 'unavailable after' meta tag is used to remove a page from the index after a certain date, but it requires that the page be crawled again on that date by Google to be effective....
John Mueller May 21, 2015
★★★ Is a separate mobile sitemap still necessary for your site in 2025?
It is not necessary to have a separate sitemap for mobile URLs if the 'rel=alternate' and 'canonical' relationships with the desktop versions are properly configured....
John Mueller May 21, 2015
★★★ Why does changing your site lead to a slowdown in indexing your pages?
Websites undergoing a significant change, such as switching to HTTPS or a new domain structure, may experience a temporary slowdown in the full indexing of their pages....
John Mueller May 21, 2015
★★★ Do you really need to fix all Search Console errors to rank?
Search Console displays the errors that Google has detected while crawling your site and application. Fixing these errors allows all your pages to appear in search results....
Google May 20, 2015
★★★ Does Googlebot really index all the JavaScript on your site?
Googlebot is quite effective at understanding and indexing JavaScript-generated content if the URLs and server responses are crawlable. It is recommended to test JavaScript-based sites to ensure that ...
John Mueller May 19, 2015
★★★ Can server errors really cause your key pages to vanish from Google's index?
Server errors like 404 or 500 can cause a page to disappear from the index if they affect important URLs. It's crucial to ensure that these errors do not occur on essential pages for ranking....
John Mueller May 19, 2015
★★★ Do hidden tabs truly hinder the indexing of your critical pages?
If critical information for your page is located in hidden tabs, it is advisable to make it visible or to create separate URLs where this information is visible by default. This can help improve the i...
John Mueller May 19, 2015
★★★ Does Google News really recommend using keywords for indexing?
Using keywords is encouraged in articles to help Google News understand the content and classify it correctly. Keywords contribute to better associations of articles by thematic clusters....
Google May 12, 2015
★★★ How can you resolve crawling errors that hinder indexing in Google News?
Webmasters can use crawling error reports in Google News to diagnose and resolve article indexing issues. It is important to check webmaster tools to understand and correct reported errors, such as ar...
Google May 12, 2015
★★★ Why does Google require a separate News sitemap to index your articles?
Google recommends using specific sitemaps for Google News because they make the discovery and indexing of articles relevant to News easier. These sitemaps allow for individual classification of articl...
Google May 12, 2015
★★★ Does the URL Parameters tool really block Googlebot from crawling?
When using the URL Parameters tool to block certain parameters, Googlebot can still crawl these URLs in a limited capacity to perform spot checks, but their crawling will generally be reduced....
John Mueller May 08, 2015
★★★ Does Google really ignore your entire sitemap for a single return tag error?
Hreflang errors in sitemaps are handled by URL. If a URL is missing the return tag, only that set is ignored, not the entire file....
John Mueller May 08, 2015
★★★ Why does blocking a page in robots.txt make the no-index tag completely ineffective?
For Google to consider the no-index tag on a page, that page must not be blocked by robots.txt; otherwise, Google cannot see the no-index. If blocked by robots.txt, the no-index will be ineffective....
John Mueller May 08, 2015
🔔

Get real-time analysis of the latest Google SEO declarations

Be the first to know every time a new official Google statement drops — with full expert analysis.

No spam. Unsubscribe in one click.