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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★★★ Is it true that Google is massively ignoring product aggregation sites?
A large product aggregator website is facing an indexing anomaly. Googlebot has crawled the site 1.17 million times in just a few weeks. Only 4 pages are indexed out of a total of 180,000, and even th...
John Mueller Oct 06, 2026
★★★ Can a site's perceived quality really limit its crawling by Google?
A site's perceived quality influences the frequency and extent of Google's crawling and indexing. A perception of low quality can limit the amount of crawled content....
John Mueller Oct 01, 2026
★★★ HTML or XML Sitemap: Which Should You Prioritize for Google Crawling?
An HTML sitemap is designed for users to navigate the site and is not a replacement for an XML sitemap, which is structured specifically for search engines....
Martin Splitt Oct 01, 2026
★★★ Why does Google fail to crawl your sitemaps and how can you fix it?
The 'Couldn't Fetch' errors can be due to the host load, where Google did not have time to extract the sitemap file, or to an insufficient crawl request, often based on the perceived quality of the si...
John Mueller Oct 01, 2026
★★★ Is a XML sitemap really necessary for small websites?
Google recommends keeping a sitemap file activated, even for small sites, as most content management systems generate it automatically. There is no negative impact, even if the site remains small....
John Mueller Oct 01, 2026
★★ Should you hide your sitemaps in robots.txt instead of submitting them publicly?
Sitemap files can be submitted via Search Console or indicated in the robots.txt file. Google can discover sitemaps through these methods, which is useful for sites that do not want their sitemap to b...
John Mueller Oct 01, 2026
★★★ Is it really necessary to stick to 50,000 URLs per sitemap?
Each sitemap file can contain up to 50,000 URLs and has a size limit of around megabytes. Files can be compressed, but the size limit concerns the uncompressed version....
John Mueller Oct 01, 2026
★★★ Are XML News Sitemaps Really Essential for News Websites?
News websites benefit from specific sitemaps that list the last 1,000 modified pages. This facilitates the tracking of significant updates by Google's systems....
Martin Splitt Oct 01, 2026
★★ Do modern CMS really handle sitemaps automatically?
Most content management systems and static hosting services generate sitemap files by default, requiring little manual intervention for activation....
Martin Splitt Oct 01, 2026
★★★ Do sitemaps really influence Google's choice of the canonical URL?
Google uses sitemaps to help choose the canonical version of a URL. If a URL is listed in a sitemap, it increases the chances that Google will select it as the canonical version....
John Mueller Oct 01, 2026
★★★ Why does Google often overlook the lastmod field in your sitemaps?
The lastmod field in sitemaps is used to indicate the last significant modification date of a page. However, many sites get the dates wrong, which can lead Google to disregard them....
John Mueller Oct 01, 2026
★★ Why does Google deindex your pages due to errors served with HTTP 200?
A business and supplier site has seen its pages deindexed by Google. The search engine has chosen a third-party online betting site as the canonical URL, with no apparent content relation. Live testin...
John Mueller Sep 29, 2026
★★★ Why does Google show hreflang URLs marked as ‘not indexed’ in search results?
Gary Illyes (Google) clarified how alternative hreflang URLs work during canonicalization, following a question posed on LinkedIn by Faiez Javaid. The initial question was: If Google selects a single ...
Gary Illyes Aug 18, 2026
★★★ Does Googlebot send other HTTP requests besides GET and POST on your site?
Gary Illyes confirmed on LinkedIn that Google's crawlers do not only send HTTP GET and POST requests, but also HEAD, OPTIONS, PUT, PATCH, and DELETE requests, in response to several questions received...
Gary Illyes Aug 11, 2026
★★★ What should you do when your SEO metadata contradicts itself?
On Bluesky, John Mueller responded to a user who reported that a product page displayed 'out of stock' while the server HTML and structured data indicated 'available'. John Mueller advises against hav...
John Mueller Aug 04, 2026
★★★ Does the Search Console removal tool really block Google from crawling your pages?
The Search Console removal tool does not prevent pages from being crawled; it only removes them from search results. It is not a solution for managing search result pages....
John Mueller Jul 30, 2026
★★★ Are Internal Search Results Draining Your Crawl Budget?
Internal search results pages can lead Googlebot to crawl an infinite number of URLs, wasting the site's crawl budget and potentially overloading your server....
John Mueller Jul 30, 2026
★★★ Is it really necessary to replace robots.txt with noindex to block internal search results pages?
Another option is to use the noindex tag to prevent the indexing of search results pages while allowing Google to explore them....
John Mueller Jul 30, 2026
★★★ Should you really block internal search result pages with robots.txt?
It is advised to block internal search result pages with a robots.txt file to prevent an infinite number of crawlable URLs by Google....
John Mueller Jul 30, 2026
★★★ Why does Google ignore your robots.txt rules even when they explicitly disallow access?
A Reddit user was managing a Shopify client whose internal search bar was being exploited by spam: spammer requests were generating search result URLs pointing to third-party sites. The client had blo...
John Mueller Jul 28, 2026
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