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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★★★ Why is noindex more effective than robots.txt for hiding a site from Google?
To prevent a site from appearing in search results while keeping it accessible, use the meta robots noindex tag rather than robots.txt. With robots.txt, the site could still be found if someone search...
John Mueller Apr 18, 2024
★★★ Is the Indexing API really restricted to job postings and events only?
The Indexing API is limited to job postings and broadcast events. It might work for other content types, but since it's not designed for that, it could stop working overnight for unsupported verticals...
Gary Illyes Apr 18, 2024
★★ Does noindex follow really guarantee that Google will explore your internal links?
With noindex follow on pagination pages, two outcomes are possible: either Google sees the page and follows the links before removing it from the index, or the page is removed and nothing is used. The...
John Mueller Apr 18, 2024
★★★ Do external 404 errors really hurt your Google rankings?
The false 404 errors that Googlebot could have explored cannot reasonably be attributed to a drop in rankings. It is normal to have a certain number of 404 errors on a site and you do not need to fix ...
Gary Illyes Apr 18, 2024
★★★ Do short 503 errors really impact your site's crawl rate?
Serving a 503 code during an extended period will result in a decrease in crawl rate. However, 10 to 15 minutes of unavailability several times per week is not considered prolonged and should not caus...
Gary Illyes Apr 18, 2024
★★★ Should You Really Worry About Crawling and Indexing During Core Updates?
On LinkedIn, Gary Illyes provided some clarification about the independence of indexing systems from algorithm updates, particularly Core Updates. He states that indexing, canonicalization, and the va...
Gary Illyes Apr 16, 2024
★★ Should You Really Stop Focusing on External Links for SEO?
John Mueller advised against focusing excessively on external links, arguing that it could primarily prove to be a waste of time. He also explains that there is no objective method to count links on t...
John Mueller Apr 09, 2024
★★ Does Google Really Fix Your HTML Errors During Indexing?
During indexing, Google analyzes HTML and corrects semantic issues it encounters. This ensures that all HTML tags are in the right place and where they should be....
Gary Illyes Apr 04, 2024
★★★ What does Google really look at before deciding to index your pages?
For a web page to be indexed on Google Search, Google must process and analyze the page's content as well as its metadata. This analysis is necessary before any indexing decision can be made....
Gary Illyes Apr 04, 2024
★★★ Can an unsupported tag in <head> really break all your SEO metadata?
The <head> element contains metadata in the form of meta and link tags. If an unsupported tag is used in this section, Google and browsers automatically close the <head> element just before the unsupp...
Gary Illyes Apr 04, 2024
★★★ How does Google decide which version of a duplicate page to index?
Once the HTML is processed, Google determines whether the page is a duplicate of another page it already knows about. It then selects which version should be retained in the index as the canonical ver...
Gary Illyes Apr 04, 2024
★★★ How does Google decide which version to index when you have duplicate content?
The canonical version is the page from a group of duplicate pages that best represents that group according to the signals collected by Google on each version. Mostly, only canonical pages appear in s...
Gary Illyes Apr 04, 2024
★★★ Does Google really analyze every element of your content during indexation?
The indexation process includes processing and analyzing textual content, key content tags, attributes, images, and videos. These elements allow Google to calculate signals used to rank pages in searc...
Gary Illyes Apr 04, 2024
★★★ Does Google really decide which of your pages deserve to be indexed?
Once signals are collected and duplicates are eliminated, Google decides whether or not to index the page. This process is called index selection and depends largely on the page quality and the signal...
Gary Illyes Apr 04, 2024
★★★ How does Google weigh different SEO signals when choosing your canonical page?
Signals are information that search engines collect about web pages and websites. Some signals are simple, like HTML annotations left by site owners (rel=canonical), while others, such as a page's imp...
Gary Illyes Apr 04, 2024
★★ What information does Google actually store in its index for canonical pages?
If a canonical page is indexed, Google stores the information collected about it and its cluster in Google's index. The index is technically a large database distributed across thousands of computers....
Gary Illyes Apr 04, 2024
★★★ What are the actual elements Google analyzes before deciding to index your page?
Google parses several elements when analyzing a page, including content tags, images, videos and various attributes. These elements serve as signals to determine whether a page should be indexed or no...
Gary Illyes Apr 04, 2024
★★★ How does Google actually choose the canonical page in a duplicate cluster?
Each cluster of duplicate pages will have a single version of content selected as canonical. This version will represent the content in search results for all other versions in the cluster....
Gary Illyes Apr 04, 2024
★★ Is rendering really a mandatory step in Google's indexing process?
Rendering of web pages is a step in Google's indexing process. Google must render pages to process them correctly before indexing....
Gary Illyes Apr 04, 2024
★★ Should You Start Using AVIF Format for Your SEO Images?
Unlike BMP, GIF, JPEG, PNG, WebP, and SVG formats, Google Search does not currently support the AVIF image format. On X, John Mueller indicated that this situation should change in the future, without...
John Mueller Apr 02, 2024
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