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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★★★ Do you really need to index all your pages to rank effectively?
There is no optimal ratio between indexed and non-indexed pages. A site can function well even if many pages are not indexed, as long as the core content is well-represented in the index....
Martin Splitt Jul 16, 2026
★★★ Should you stop using the indexing report as a checklist?
The indexing report should be used to spot trends or unexpected changes, rather than as an inventory check. This helps to quickly identify potential technical or configuration issues....
Martin Splitt Jul 16, 2026
★★★ What happens when Google indexes fewer pages because you have a lot of crawled but ignored content?
A large number of pages marked as 'crawled but not indexed' may indicate a broader quality issue on the site, prompting Google to index fewer pages....
John Mueller Jul 16, 2026
★★★ Should You Really Fix All Non-Indexed Pages in Search Console?
The indexing report in Google Search Console should not be treated as a static inventory of things to "fix." Non-indexed pages are not necessarily errors to correct, but rather an opportunity to verif...
Martin Splitt Jul 16, 2026
★★★ Could your CDN or hosting provider be sabotaging your indexing without you knowing?
Systematic server or interstitial errors caused by a CDN or hosting provider can negatively affect your SEO, especially if pages return unexpected responses like 404 or display intrusive interstitials...
John Mueller Jul 16, 2026
★★★ Should you really fix every issue reported in the index coverage report?
It is incorrect to treat the index coverage report as a simple list of things to "fix." This report should be used to detect unexpected patterns and not as a static inventory of pages to correct....
John Mueller Jul 16, 2026
★★ Should you really block AI crawlers in your robots.txt?
John Mueller stated on Reddit that the "Content Signals" directive in robots.txt, created by Cloudflare last year, has "no effect" on crawlers or LLMs. According to him, it only adds unnecessary weigh...
John Mueller Jul 14, 2026
★★ Will AI agents revolutionize SEO ranking criteria?
John Mueller responded to a question regarding the impact of AI agents (such as Gemini) on Google's quality criteria. According to him, the fundamentals do not change. A site that is useful for humans...
John Mueller Jun 30, 2026
★★★ Should you really ditch Markdown for HTML when it comes to SEO?
During the Off The Record podcast episode, John Mueller and Martin Splitt reaffirmed that HTML remains the absolute standard for SEO, with Markdown offering no benefits for search engine optimization....
John Mueller Jun 23, 2026
★★★ Should you use localized subdirectories to boost your international SEO?
According to John Mueller, choosing between a generic folder structure (e.g., /blog/) or a localized one (e.g., /en-us/blog/) to target the U.S. market (or another market) makes no practical differenc...
John Mueller Jun 23, 2026
★★★ Why is HTML still essential for crawling in 2025?
Having HTML pages is critical for a search engine to identify the links and structure of your site, which is essential for crawling and discovering new content....
John Mueller Jun 15, 2026
★★★ Should you convert your site to Markdown to boost your SEO?
Transforming your website into Markdown for better recognition by language models does not provide any tangible advantage, since search crawlers are already optimized to handle HTML, which is the back...
John Mueller Jun 15, 2026
★★★ Is it really necessary to split your XML sitemap into multiple files?
Some SEO experts choose to split their XML sitemap into several categories based on their site structure. In a Reddit discussion, John Mueller shared the reasons he has observed over the years: Tracki...
John Mueller May 26, 2026
★★★ Is it really necessary to check Search Console daily, or are email alerts enough?
On Reddit, John Mueller clarified the usefulness of Search Console email alerts. He believes that email alerts are very beneficial as they indicate major issues. They allow for a quick one-click che...
John Mueller May 26, 2026
★★★ Is Google's indexing API becoming unusable due to abuse?
John Mueller stated on Bluesky that Google's indexing API is overwhelmed by bloggers attempting to pose as legitimate sites. This situation is pushing Google to become stricter about access to this to...
John Mueller May 19, 2026
★★ Is AI truly simplifying SEO workflows or are there critical technical risks lurking beneath the surface?
AI can facilitate the creation and testing of websites, but having a technical understanding of deployment scripts, pre-submissions, and linting remains crucial to ensure site integrity, particularly ...
John Mueller May 07, 2026
★★★ Do AI-generated sites need a specific technical setup to rank well?
To optimize the SEO of an AI-generated site, it is important to specify technical details during configuration, such as setting up canonical tags, sitemaps, or a robots.txt file, to ensure that the si...
John Mueller May 07, 2026
★★ Is the massive deindexing on Google Search real or just a bug in the Search Console?
Since the beginning of April, many SEO professionals and website owners have reported an acceleration in the deindexing of their pages by Google. Pedro Dias (former Googler) and other specialists note...
John Mueller May 05, 2026
★★ Should you really stick to the 100KB limit for your robots.txt file?
Robots.txt files that do not exceed 100KB are common, which is convenient for ensuring optimal performance during crawling by search engines....
Martin Splitt Apr 23, 2026
★★★ Is BigQuery really essential for analyzing your SEO data at scale?
Google encourages the use of BigQuery to query large web datasets, although it can sometimes be costly, it is crucial for gaining detailed insights into elements such as robots.txt files....
Martin Splitt Apr 23, 2026
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