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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★★★ Does Google really compare the initial HTML AND rendered content for canonicalization?
Canonicalization and deduplication start with the initial HTML but also consider the rendered HTML. Google compares the content hashes of the initial HTML and the rendered HTML. If the hashes differ a...
Martin Splitt Nov 25, 2020
★★★ Is it true that Google really analyzes everything in the initial HTML before rendering?
Google analyzes the initial HTML to extract links (to add to the crawl queue), detect HTTP errors, and read meta tags (canonical, description, robots). Canonicalization begins in the initial HTML but ...
Martin Splitt Nov 25, 2020
★★★ Does cutting down on embedded resources really boost speed and enhance crawling?
Reducing embedded resources generally makes pages faster for users, thereby improving both crawling and user experience....
John Mueller Nov 19, 2020
★★★ Does Google really adjust the crawl budget automatically based on your server's capacity?
Google’s systems automatically determine the maximum number of requests a server can handle over a given period. This parameter is automatically adjusted over time....
John Mueller Nov 19, 2020
★★★ Is it true that Google's Web Rendering Service really indexes what users see?
The Web Rendering Service (WRS) is used by Googlebot to display pages like a browser, allowing it to index all the content in the same way that users see it....
John Mueller Nov 19, 2020
★★★ Is your server slowing down? Does Google really cut your crawl budget because of that?
When Google notices that a server starts to slow down or return server errors, the available crawl budget for crawlers is reduced....
John Mueller Nov 19, 2020
★★★ Should you really be concerned about crawl budget for your site?
Crawl budget is not a concern for most sites, as Google has no trouble exploring enough URLs on the majority of websites....
John Mueller Nov 19, 2020
★★★ Is the crawl budget really just to protect your servers or is there more to it?
Crawl budget is a system used by Google to limit the number of requests made to a server in order to avoid causing issues during crawling....
John Mueller Nov 19, 2020
★★★ Is it really necessary to reduce embedded resources to improve the crawling of large sites?
For large sites, reducing the number of embedded resources necessary to display a page can aid in Google crawling....
John Mueller Nov 19, 2020
★★★ Is crawl budget really a non-issue for most websites?
Crawl budget is a topic that mainly affects large websites, typically those with more than a few hundred thousand URLs....
John Mueller Nov 19, 2020
★★ Why does Google index your images with a completely separate system from the rest of your content?
Google uses a completely different indexing mechanism for images. During content conversion, image tags are extracted and their URLs are sent to a specialized image indexer that performs image recogni...
Gary Illyes Nov 16, 2020
★★ Why is video indexing so complicated for Google (and how can you take advantage of it)?
Video indexing is very complex because it requires processing around 20-24 frames per second plus the audio track to understand the content. Google uses the same indexing mechanism as for images, but ...
Gary Illyes Nov 16, 2020
★★★ Why doesn't Google index your non-canonical AMP pages?
Non-canonical AMP pages (AMP as an alternative format) are not indexed. Google only indexes the main HTML version and presents AMP as an alternative format in search results for users....
Gary Illyes Nov 16, 2020
★★★ Are Web Stories really indexed like regular pages by Google?
Web Stories are built on AMP and are canonical AMP pages. They are treated like regular web pages that can be indexed and appear in search, Discover, and even image search....
Pascal Birchler Nov 16, 2020
★★★ Is it true that Google indexes canonical AMP pages just like classic HTML?
When a page is both standalone and canonical (standalone AMP), Google treats it exactly like a normal HTML page and it can be indexed in the same way as a classic HTML page....
Gary Illyes Nov 16, 2020
★★★ Should you really choose between 301 redirect and canonical for merging two sites?
To merge two sites, Google recommends the 301 redirect if the goal is purely SEO and a complete cleanup. The canonical is preferable if you want to keep the old site active for reasons other than SEO....
John Mueller Nov 13, 2020
★★ Does Google really impose an indexing delay based on the quality of your pages?
Google does not have an intentional delay between indexing a page and displaying it based on quality or mobile usability issues. If the content is in pure HTML, it is indexed immediately after crawlin...
John Mueller Nov 13, 2020
★★★ Why does it take Google 3 to 6 months to refresh an entire large site?
For large sites, Google cannot crawl everything in one day. The crawl budget balances the discovery of new content and refreshment. A complete site can take 3 to 6 months to be fully refreshed, priori...
John Mueller Nov 13, 2020
★★★ Why does Google take 3 to 6 months to crawl your complete redesign?
For a large site updating all its content in one day, Google cannot crawl everything immediately. Crawling is typically spread over 3 to 6 months. During a major update, Google prioritizes important a...
John Mueller Nov 13, 2020
★★★ Do you really need to choose between a 301 redirect and a canonical tag to merge two sites?
To merge two sites, a 301 redirect is recommended if the goal is purely SEO-focused and about cleaning everything up. The canonical tag allows for keeping the old site active while concentrating SEO e...
John Mueller Nov 13, 2020
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