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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★★★ Can mixed content on HTTPS really push Google back to your HTTP version?
Google prefers to index the HTTP version if the HTTPS version has mixed content issues, unless strong signals indicate otherwise....
John Mueller Jan 15, 2016
★★★ Does Google News really boost your ranking in web search?
Being indexed in Google News is not used as a ranking factor in web search....
John Mueller Jan 15, 2016
★★★ Can you really merge multiple sites into one using rel="canonical"?
Using rel="canonical" does not improve SEO by duplicating subdomains to other sites. It does not merge pages into a single SEO entity and should not be done with the intent to deceive the system....
John Mueller Jan 12, 2016
★★★ Should you block pages based on the referrer or use server authentication?
If you are blocking access to pages based on the referrer, consider noindexing them. For confidential content, server-side authentication is recommended....
John Mueller Jan 12, 2016
★★★ Is rel=canonical really enough to manage A/B testing in SEO?
During A/B testing, if one version of the page is essentially equivalent to the homepage, you can use rel=canonical to direct search engines to the main URL....
John Mueller Jan 12, 2016
★★ Could a sudden surge in URLs trigger a warning in Google Search Console?
A sudden increase in URLs can trigger a warning. This happens when URL parameters lead to multiple variations of the same page. Ensure that these parameters are relevant and necessary for crawling and...
John Mueller Jan 12, 2016
★★★ Should you use rel=canonical between subdomains and the main domain to manage duplicate content?
Using rel=canonical to link duplicate content from a subdomain to the main domain does not create any added value in SEO. The canonicality indicates that pages should be treated as one....
John Mueller Jan 12, 2016
★★★ Should you really use rel=canonical on your A/B test pages?
If one version of a page is essentially equivalent to another, use "rel=canonical" to point to the main URL. This applies even if the test page is meant for 10% of traffic for a year....
John Mueller Jan 12, 2016
★★★ What’s going on when Google suddenly uncovers thousands of new URLs on your site?
If you receive a message indicating a high number of newly discovered URLs, it may be due to the presence of numerous URL parameters or 'noindex' pages. Ensure that only the desired URL parameters for...
John Mueller Jan 12, 2016
★★★ When Relaunching Your Site, Should You Really Prefer 301 Redirects Over Canonical Tags?
In cases of duplicate content due to a relaunch, using a 301 redirect is preferable if you want to permanently move the URLs. Use a canonical tag when redirecting the URLs is not possible....
John Mueller Dec 29, 2015
★★★ Does Google really index Flash content seamlessly?
Google can extract content from Flash files and index it with the corresponding page, but having a unique description for these files aids in ranking....
John Mueller Dec 29, 2015
★★★ Why does traffic drop after a HTTPS migration and how long does recovery really take?
When migrating a site to HTTPS, it is normal to see initial traffic fluctuations. However, traffic should stabilize back to prior levels after a while, once the site is fully reindexed under HTTPS....
John Mueller Dec 29, 2015
★★★ Should you really have a web equivalent to index the content of a mobile app?
For the content of an app to be indexed, there must be direct links to the content within the app, known as 'app deep links'. Additionally, it is recommended that the app content has a web equivalent ...
John Mueller Dec 18, 2015
★★ Should you really invest in AMP to boost your SEO?
Google plans to launch AMP integration into search results by the end of February, thereby enhancing the promotion of the technology by then. Developers are encouraged to explore AMP to determine its ...
John Mueller Dec 18, 2015
★★★ How should you correctly manage the canonical relationship between AMP and standard pages?
In the AMP setup, main web pages retain their priority for indexing and ranking. AMP pages must include a rel=canonical link to the standard page, allowing Google to show AMP pages in search results w...
John Mueller Dec 18, 2015
★★★ Can installing a mobile app truly boost your Google ranking?
Having an installed app can serve as a ranking factor because it indicates user interest in the content provided by that app. However, this is applied only to users who have already installed the app....
John Mueller Dec 18, 2015
★★★ Why does Google require unrestricted access to JavaScript and CSS in your robots.txt?
Google needs to see web pages as a user would, which requires access to JavaScript and CSS from the robots.txt file. This allows Google to analyze the actual rendering of mobile pages....
John Mueller Dec 18, 2015
★★★ Should you really block content with robots.txt to deindex it?
To remove already indexed pages, it is advisable to use the URL removal tools, especially if you cannot add a noindex directly due to the robots.txt block....
John Mueller Dec 15, 2015
★★★ Why does Google crawl certain pages more often than others?
Pages deemed important by Google are crawled more frequently, which is not a direct ranking factor but a symptom of their importance....
John Mueller Dec 15, 2015
★★★ Is thin content really a concern for Google or is it all about user experience?
Thin or duplicate content can be problematic, but Google recommends focusing on user experience to determine its value. Use noindex, redirects, or canonicalization to manage these pages, but always pr...
John Mueller Dec 11, 2015
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