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 duplicate content really a top SEO concern we should address?
Unless you have a large scale or slow servers, Google can usually handle duplicate content. It's often better to use canonical tags to point to the original content rather than relying solely on noind...
John Mueller Aug 24, 2017
★★ Can you really declare multi-domain sitemaps via robots.txt, or should you go through Search Console?
To include sitemaps from multiple domains, you can either include the sitemap directive in the robots.txt file of each domain or use a site management tool like Google Search Console to prove ownershi...
Google Aug 23, 2017
★★★ Can Google really discover and index all the JavaScript links on your site?
Google can discover URLs even if they are generated by JavaScript, as URLs present in JavaScript files can be crawled and indexed....
Google Aug 23, 2017
★★★ Can the HTTPS protocol really block Googlebot from crawling your site?
Googlebot fully supports the HTTPS protocol and it does not affect the crawling or indexing of pages....
Google Aug 23, 2017
★★★ How does the canonical tag truly safeguard your syndicated content from duplicate content issues?
For syndicated content, always use the canonical tag pointing to the URL of the original article to avoid duplicate content issues....
Google Aug 23, 2017
★★★ Do links in dropdown menus really get crawled by Google?
Google can crawl links that are in dropdown menu blocks, even if these links are not immediately visible to users. Choose the navigation structure that is most convenient for you....
John Mueller Aug 22, 2017
★★★ How does the textual context around images affect their indexing?
To optimize image indexing, surround them with relevant content. This is particularly crucial if your site offers little textual context....
John Mueller Aug 22, 2017
★★★ How long should you really wait for Google to recognize Schema markup?
The time needed for Schema markup to be acknowledged can vary, with some pages being crawled in a few days, while others may take weeks or months. Google processes the markup as soon as it sees it on ...
John Mueller Aug 22, 2017
★★★ Does mobile-first indexing really rely on Google's mobile search results?
The results of Google Assistant and the future transition to a mobile-first index depend on mobile search results....
John Mueller Aug 22, 2017
★★★ How often does the Google Panda algorithm really run?
Google's algorithms, including Panda, are regularly updated as the web is recrawled and reindexed. There is no fixed period for their execution....
John Mueller Aug 22, 2017
★★★ Should You Worry About Google Search Console's 10,000-Pixel Rendering Limit?
The web page rendering in Search Console ("Crawl > Fetch as Google" section) stops at the 10,000th pixel according to a user's test. But, of course, all the HTML code is crawled and indexed. It's just...
Google Aug 21, 2017
★★★ How Can You Prevent Google from Indexing Your Pre-Production Site?
John Mueller posted a fairly lengthy message on Google+ about the best way to prevent a test site (pre-production) from being indexed by Google, as we unfortunately see so often. If this mishap happen...
John Mueller Aug 21, 2017
★★ What are the only two fields in an XML sitemap that Google actually cares about?
John Mueller explained on Twitter that in XML files, the two most important fields are the URL (<loc>) and the last modification date (<lastmod>)....
John Mueller Aug 21, 2017
★★★ Why Is Google Indexing More URLs Than Those Declared in Your XML Sitemap?
A user pointed out to John Mueller that in their Search Console, the XML Sitemaps report indicated there were more indexed URLs than URLs in the Sitemap. John responded that this likely came from the ...
John Mueller Aug 21, 2017
★★ Does Googlebot Send a Referrer When Crawling Your Pages?
John Mueller indicated on Twitter that Googlebot, when crawling a page, does not return a referrer URL, as a user would when browsing on a browser. A Googlebot visit is therefore similar to direct tra...
John Mueller Aug 14, 2017
★★ What's the Maximum Page Size Google Will Actually Crawl?
John Mueller explained that Googlebot's current crawl limit for a web page is 200 MB (the last known limit in 2015 was 10 MB)....
John Mueller Aug 14, 2017
★★ Can You Combine Noindex and Canonical Tags on the Same Page?
A user asked John Mueller the following question: "if a page contains both a 'noindex' tag and a 'canonical' tag, does the canonical transmit the indexing prohibition to the canonical page?" John Muel...
John Mueller Aug 14, 2017
★★ Should You Really Deindex Your Internal Search Results Pages?
John Mueller explained on Twitter why Google requires internal search results pages from a website to be deindexed: they create infinite crawl spaces, are often low-quality pages, and frequently prese...
John Mueller Aug 14, 2017
★★★ Does Google really index all the JavaScript content on your site?
Google can process JavaScript content displayed by default but may miss content that needs user interaction to appear, such as clicking on tabs....
John Mueller Aug 11, 2017
★★★ What really happens when noindex and canonical contradict each other on the same page?
The simultaneous use of a rel=canonical and a noindex tag can cause confusion for our algorithms. However, we generally try to follow the rel=canonical, assuming that it is an error or an attempt to e...
John Mueller Aug 11, 2017
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