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 3 questions

Less than 30 seconds. Find out how much you really know about Google search.

🕒 ~30s 🎯 3 questions 📚 SEO Google
★★★ Should you worry if Google isn't caching your pages?
The simple fact that a page is not being cached does not mean there is a problem with that page's indexation. Cache is not required for SEO....
John Mueller Jun 20, 2023
★★ Why doesn't Google cache certain pages on your website?
Some pages are not cached due to Google's infrastructure system design choices. This does not mean there is a problem with the indexation of these pages....
John Mueller Jun 20, 2023
★★★ Is Google's cache really essential to get indexed and rank in search results?
Pages do not need to have a cached copy to appear in Google Search. Caching and indexation are two distinct and independent processes....
John Mueller Jun 20, 2023
★★ Do HSTS headers really impact your SEO performance?
HSTS security headers have no impact on SEO. Google uses a canonicalization process to choose the most appropriate version of a page to crawl and index, without relying on HSTS headers....
John Mueller Jun 07, 2023
★★ Does Google really reprocess your sitemap on every crawl?
Google doesn't reprocess a sitemap that hasn't changed since the last crawl, as a resource optimization strategy. As soon as a change appears (URL or lastmod), the sitemap is analyzed again. Deleting ...
Gary Illyes Jun 07, 2023
★★ Do numbers in your URLs really hurt your search rankings?
Numbers in URLs are not bad for SEO. You can use numbers, letters, non-Latin characters, or Unicode symbols. Only avoid temporary identifiers that change with each visit, as this complicates crawling....
Martin Splitt Jun 07, 2023
★★★ Can you really prevent Google from crawling certain parts of a webpage?
It is not possible to block Googlebot from crawling a specific section of an HTML page. You can use data-nosnippet to exclude text from snippets, or use iframes/JavaScript blocked by robots.txt, but t...
John Mueller Jun 07, 2023
★★ Does Google really care about the difference between HTML and XML sitemaps? Here's what John Mueller revealed
An HTML sitemap is intended for users and may indicate unclear navigation. An XML sitemap is exclusively for search engine crawlers. These are two different tools despite sharing a similar name....
John Mueller Jun 07, 2023
★★ How can you permanently block Googlebot from crawling your website?
To block Googlebot permanently, add a disallow / rule for the Googlebot user-agent in robots.txt. To block complete network access, create a firewall rule denying Googlebot IP ranges, available in the...
Gary Illyes Jun 07, 2023
★★★ Does canonical alone really prevent syndicated content from appearing in Discover, or do you actually need to add noindex?
To prevent syndicated versions of your content from appearing in Google Discover, use the meta robots noindex tag in addition to the canonical link. Canonical alone is an insufficient indicative signa...
John Mueller Jun 07, 2023
★★★ Is it really worth your time submitting an XML sitemap to Google?
Submitting a sitemap tells Google where your content is located, but it absolutely does not guarantee that URLs will be crawled or indexed. Crawling and indexing depend on content quality and relative...
Gary Illyes Jun 07, 2023
★★★ Does index bloat really exist at Google?
Google does not have an index bloat concept that artificially limits the number of indexed pages per site. Simply ensure that the pages you submit for indexing are truly useful, regardless of the tota...
John Mueller Jun 07, 2023
★★ Should you ditch client-side rendering to boost your SEO rankings?
Client-side rendering has value for interactive applications, but it's not the best strategy for informational websites where content indexability is the priority....
Martin Splitt May 30, 2023
★★★ Does a Misconfigured Last-Modified HTTP Header Really Hurt Your SEO Rankings?
In response to an apparently incorrect article, John Mueller left a message on Mastodon to set the record straight. In his post, Google's most famous employee stated: "I came across an article about t...
John Mueller May 30, 2023
★★★ Should you really prioritize the 410 code over 404 to signal a deleted page?
Google treats HTTP 404 (Not Found) and 410 (Gone) status codes the same way internally. Search Console displays them identically as well, which reflects the actual processing performed by Google's cra...
Martin Splitt May 30, 2023
★★★ Is JavaScript really indexed by Google, or should you still be cautious about it?
Google is capable of rendering JavaScript and indexing client-side generated content. The claim that JavaScript content is not indexed by Google is false, as long as there are no technical problems....
Martin Splitt May 30, 2023
★★★ Can a single JavaScript rendering failure cost you weeks of lost search visibility?
If JavaScript rendering fails during a crawl with client-side rendered content, Google will have nothing to index because the HTML is empty. You'll have to wait for the next crawl, which can delay ind...
Martin Splitt May 30, 2023
★★ Can Google actually crawl and index Web3 domains like .eth?
Web3 addresses like .eth domains are invented and unofficial top-level domains. Google cannot crawl or index them, even if a browser plugin allows their resolution. They operate similarly to the Tor n...
John Mueller May 30, 2023
★★★ Is your client-side rendering (CSR) sabotaging your Google indexation chances?
With client-side rendering, the base HTML is empty and all content is generated by JavaScript through API requests. Google must fully render these pages with no possibility of falling back to existing...
Martin Splitt May 30, 2023
★★★ Are your key pages missing from Google's search results? Here's how to fix your indexation issues
If important pages from your site don't appear in the list within the Performance report, it means you're not receiving Google Search traffic to these pages. Use the Inspect URL tool to check whether ...
Daniel Waisberg May 23, 2023
🔔

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.