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 Drop Canonical Tags for Noindex on Syndicated Content?
On X, an SEO expert asked John Mueller what happens to the signals associated with a syndicated article on a partner platform once Google considers the partner as canonical. "Does this mean that all t...
John Mueller Feb 06, 2024
★★★ Does structured data really help Google understand your content better?
Structured data is inserted into the page and helps machines like Googlebot better understand the page's content....
Martin Splitt Feb 01, 2024
★★★ Can You Actually Force Google to Reindex Your Entire Website All at Once?
In a video, John Mueller answers the question: Is there a mechanism to request the reindexing of an entire website all at once? According to him, there is no method to trigger a complete recrawl and r...
John Mueller Jan 30, 2024
★★ Are XML sitemaps really essential for getting your website indexed by Google?
Ideally, use XML sitemaps to help search engines. Most websites support them by default, so you may not have to do anything special....
John Mueller Jan 23, 2024
★★★ Should You Worry About Migrating Your Domain from www to non-www for SEO?
On Mastodon, in response to a user wondering why their site's URL change, involving 301 redirects, was being poorly handled, John Mueller stated that switching from the www subdomain to the non-www ve...
John Mueller Jan 23, 2024
★★★ Is there really no way to force Google to re-index your entire website at once?
There is currently no way to trigger a complete recrawl and reprocessing of an entire website all at once. Google does not offer a mechanism to request the re-indexation of an entire site simultaneous...
John Mueller Jan 23, 2024
★★★ Does Google really crawl some pages more often than others, and how can you influence this?
Important pages tend to be checked more often by search engines and will therefore be updated more quickly than less important pages....
John Mueller Jan 23, 2024
★★★ Why is linking your new pages from your existing website absolutely critical for Google indexing?
If you're adding new pages, make sure they are linked from your existing website. This practice helps Google discover them and index them....
John Mueller Jan 23, 2024
★★★ Should you really link your new pages from high-authority pages to accelerate indexing?
If new pages are important, create links to them from other important pages on your site. This internal linking strategy accelerates their discovery and indexing....
John Mueller Jan 23, 2024
★★★ Should You Really Worry About Hacked Pages That Stay Indexed for Months?
Following an attack that resulted in the creation of thousands of pages in Japanese and Chinese, a hacking technique known as the "Japanese keyword hack," a user asked for help on Reddit. After provid...
John Mueller Jan 16, 2024
★★★ Should You Drop the prerender-status-code Tag to Avoid Soft-404s on Your Site?
In the December 2023 SEO Office Hours, Martin Splitt explained that Googlebot ignores the Prerender-Status-Code meta tag, stating: "I assume this comes from a single-page application that is rendered ...
Martin Splitt Jan 02, 2024
★★★ Could Your Indexing Problems Really Be Caused by a Simple Domain Configuration Error?
Following an indexing problem encountered by a user with their site, which they believed could have been caused by the Core MVC framework or the HTTPS protocol, John Mueller pointed out that the site ...
John Mueller Jan 02, 2024
★★★ Can Anti-Bot Protection Accidentally Trigger Noindex on Your Site?
On X, John Mueller stated that protection measures taken against bots at the server level could sometimes trigger a noindex directive. The same thing can happen with a login page or an interstitial. A...
John Mueller Jan 02, 2024
★★★ Are Double Slashes in Your URLs Hurting Your Google Indexing?
Gary Illyes stated that the presence of a double slash (or double forward slash) in a URL could cause usability issues, but more importantly, that it could disrupt certain indexing bots. Indeed, this ...
Gary Illyes Dec 26, 2023
★★★ How Can You Structure Your Site to Speed Up Indexing of Your News Content?
During the SEO Office Hours, Gary Illyes also explained that it was wise to use a hierarchical structure for large-scale sites in order to encourage Google to explore different sections quickly. Gary ...
Gary Illyes Dec 26, 2023
★★★ Why does Google separate Googlebot and Google-Other in its crawling activities?
Google created the Google-Other user-agent to isolate crawl traffic unrelated to search. Googlebot is now reserved exclusively for search-related traffic, while Google-Other is used for search and cer...
Gary Illyes Dec 21, 2023
★★ Does Google really check 4 billion robots.txt files every single day?
Google checks the robots.txt files of roughly 4 billion hostnames daily, and the total number of sites (including subdirectories) likely surpasses this number. Any control solution must factor in this...
Gary Illyes Dec 21, 2023
★★★ Is Googlebot really rejecting HTML pages larger than 15 MB from being crawled?
Google has a 15 megabyte request size limit for crawling web pages. This limit applies to individual HTML files and is large enough for the vast majority of websites....
Gary Illyes Dec 21, 2023
★★★ Is Google-Extended really just a token and not an active crawler?
Google-Extended is not a crawler but a product token in robots.txt that allows sites to opt out from training AI models like Bard and Vertex AI. It will never appear in access logs because it is not a...
Gary Illyes Dec 21, 2023
★★★ Should you still worry about crawl budget now that Google is removing the crawl frequency parameter?
The crawl frequency parameter is being removed from Search Console because it's no longer necessary. Google's systems have improved to automatically determine an appropriate and sustainable crawl freq...
John Mueller Dec 19, 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.