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
★★★ Should you really cross rel='canonical' and rel='alternate' between desktop and mobile versions?
For sites with a distinct mobile version, use the rel='canonical' tag on the mobile version pointing to the desktop version, and the rel='alternate' tag on the desktop version pointing to the mobile v...
John Mueller Jan 27, 2017
★★★ Do automatic language redirects hurt multilingual indexing?
It is possible to automatically redirect users to a language version of your site based on their browser settings or location, but you must provide direct access and hreflang tags for each language ve...
John Mueller Jan 27, 2017
★★★ Why does Google officially reject noindex in robots.txt?
We do not officially support the use of the 'noindex' directive in the robots.txt file because people could accidentally remove their entire site from indexing....
John Mueller Jan 27, 2017
★★ Do dynamic URLs in JavaScript really cause indexing issues?
As long as the 'Fetch and Render' tool functions correctly in Search Console, using a JavaScript framework to generate dynamic URLs should not pose indexing issues. Google’s cache will display the raw...
John Mueller Jan 27, 2017
★★★ Why does GoogleBot ignore your dropdown menus and navigation forms?
GoogleBot only considers A tags to recognize links. Other navigation mechanisms, such as form selections allowing navigation, are not regarded as links. Submission via a sitemap is recommended for dis...
Google Jan 26, 2017
★★★ Does Google really take hidden JavaScript content into account?
Google even considers initially hidden content if it is used to enhance the user experience when loaded via technologies like JavaScript or AJAX, but it recommends testing the indexing of such content...
Google Jan 26, 2017
★★★ Are SPAs truly indexable without SSR, or is Google downplaying the risks?
Pages designed as SPAs should not pose indexing problems if they are properly rendered and crawlable by Google. It is recommended to provide a clear indexing path, even without SSR (Server-Side Render...
Google Jan 26, 2017
★★★ Should you really worry about crawl budget, or is it just a myth?
Google explains that it has published an article on the concept of crawl budget to clarify some misconceptions. This budget refers to the resources that Google allocates to explore a site. For most si...
Google Jan 26, 2017
★★★ How can you migrate your AMP URLs without losing your indexing?
When you change the URL of your AMP pages, for example by moving from a structure with /amp to ?amp=1, make sure to manage redirects and the 'alternate' annotations properly to avoid any negative impa...
Google Jan 26, 2017
★★★ Does pure CSS really allow Google to crawl and index menus just like JavaScript?
Using CSS exclusively to implement menus or sliding content within the Mobile-First Index is not a problem for Google, and there is no need to follow what the majority do with jQuery or similar....
Google Jan 26, 2017
★★★ Should you block the indexing of your internal search pages?
In general, Google recommends not making internal search results pages indexable, as they typically do not add much value....
John Mueller Jan 24, 2017
★★★ Do non-canonical AMP pages really factor into your site's quality assessment?
AMP pages are used in the quality calculation of a site only if they are the canonical version of the pages. If they are not, only the canonical versions are taken into account....
John Mueller Jan 24, 2017
★★★ Can Google really index client-side JavaScript sites?
Sites that are fully rendered in client-side JavaScript can be indexed by Google. However, indexing may fluctuate if Google considers these URLs unreliable....
John Mueller Jan 24, 2017
★★★ Do mobile interstitial penalties really apply in real time on your site?
Penalties for interstitials on mobile are updated during the recrawl and reindexing of pages by Google, which is more or less in real time....
John Mueller Jan 24, 2017
★★★ Can hidden CSS content still penalize your mobile-first website?
Regarding hidden content via CSS for different devices, it is important that the mobile version has relevant content visible by default, especially for mobile-first indexing....
John Mueller Jan 24, 2017
★★★ Is duplicate content across multiple subdomains really safe for your SEO?
There is generally no penalty for duplicate content across multiple subdomains. Google may choose to index only one subdomain among the others....
John Mueller Jan 24, 2017
★★ Do HTTP headers really affect how frequently Google crawls your resources?
When using CDNs or servers to distribute files like CSS, ensure that HTTP headers, such as ETags, are properly configured. This will help Google determine if files have been updated and if they need t...
Google Jan 17, 2017
★★★ Is your robots.txt blocking the indexing of your strategic pages without you knowing it?
Make sure your robots.txt file isn’t accidentally blocking pages you want indexed by Google. If a file or directory is blocked by robots.txt, it won’t be crawled, and this can affect the visibility of...
Google Jan 17, 2017
★★★ How can network or DNS blocking sabotage your Google indexing?
If Google encounters issues accessing your site, for example due to network or DNS problems, it can delay the indexing of your pages. Ensure that your site's infrastructure allows for continuous and r...
Google Jan 17, 2017
★★★ Does submitting all your URLs to the sitemap really improve crawling by Google?
To improve Google's crawling of your site, ensure that all your URLs are correctly submitted via the sitemap in the Search Console. This helps Google plan the crawling of these pages more efficiently....
Google Jan 17, 2017
🔔

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.