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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★★ Deep Links: Do you really need to choose between HTTP schema and custom schema?
Google recommends using either an HTTP schema or a custom schema for deep links. With the HTTP schema, already indexed URLs will be automatically validated. With a custom schema, each page must be ann...
Krzysztof Bielski Aug 25, 2015
★★ Does HTTP caching really affect your ranking in Google?
The duration of HTTP caching rules has no direct impact on search engine ranking. However, it may affect how frequently Googlebot updates cached pages....
John Mueller Aug 14, 2015
★★★ Why does Googlebot stubbornly recrawl your 404 pages?
Pages returning a 404 code can be recrawled from time to time by Googlebot, especially if new links to these pages appear. This is done to check if they exist again, as they may return one day....
John Mueller Aug 14, 2015
★★★ Does lazy loading really kill the indexing of your pages?
Googlebot can have difficulty indexing content that is only loaded after a user interaction, such as scrolling or clicking. It is crucial to use tools like Fetch as Google to check the full indexing o...
John Mueller Aug 14, 2015
★★★ Should you really use a 404 for pages with no search results?
John Mueller advises returning a 404 code for pages that contain no content, so that they are removed from Google's index once they are crawled again. If a 404 is not possible, a 'noindex, nofollow' t...
John Mueller Aug 14, 2015
★★★ Does Google really ignore your canonical tags when it suits them?
For canonical tags, Google considers them as suggestions, not directives. When there are clear contradictions in their implementation, Google may choose to ignore this tag and decide on the canonical ...
John Mueller Aug 14, 2015
★★★ Does Google Analytics really influence your page rankings?
Google does not use Google Analytics data for indexing or ranking. Any correlation observed between the use of Google Analytics and rankings is purely coincidental....
John Mueller Aug 14, 2015
★★ Should you redirect your doorway pages with a 301 or deindex them with noindex?
Doorway pages can be redirected with 301 if you want to merge the content. A noindex tag can also be used if you prefer to keep them accessible but invisible to search....
John Mueller Aug 11, 2015
★★★ Should you block a page with a canonical tag in robots.txt?
For Google to respect rel=canonical tags, it must be able to crawl the page with that tag. If a page is blocked by robots.txt, Google won't see the tag and cannot merge the signals from the pages....
John Mueller Aug 11, 2015
★★ Should you integrate an RSS feed to speed up the indexing of your content?
An RSS feed does not provide a direct ranking boost, but it helps Google discover and index new or updated content more quickly, especially for sites that are frequently updated....
John Mueller Aug 11, 2015
★★★ Do URL parameters in the Search Console really work the way people think?
Using parameters in Google Search Console is a way to guide Google on how to handle these URLs. However, it's not a definitive rule. If pages cause a high server load, it's better to use a robots.txt ...
John Mueller Aug 11, 2015
★★ Do 5xx errors really kill your rankings or just your crawl budget?
5xx server errors signal to Google that the site may be overwhelmed by crawls, which can reduce the crawl rate. This does not directly affect rankings, but it can impact indexing....
John Mueller Aug 11, 2015
★★★ Does Google really index JavaScript just like classic HTML?
Google treats JavaScript-generated content in the same way as classic HTML content if Googlebot can crawl all the necessary JavaScript resources for rendering the page....
John Mueller Aug 11, 2015
★★ Why does Googlebot explore your nonexistent 404 pages?
Googlebot can explore non-existing pages if your site allows navigation to infinite pages. Ensure that 'Next' buttons do not lead to sections without content to avoid unnecessary exploration....
John Mueller Jul 31, 2015
★★★ Does the 503 code really protect your site from ranking drops during an outage?
In the event of temporary server errors, using the 503 status code can indicate to Google that the issue is temporary, thus avoiding a significant drop in ranking. Pages will be reindexed as soon as p...
John Mueller Jul 31, 2015
★★★ Does a 301 redirect really transfer 100% of PageRank and ranking signals?
For URL changes, it is essential to set up a permanent 301 redirect to ensure the transfer of indexing and ranking signals to the new URL....
John Mueller Jul 31, 2015
★★★ How does Google actually index JavaScript-loaded content?
Google wants to render pages as they appear in a browser to ensure that all content loaded via JavaScript is visible and indexed correctly. This includes recognizing mobile compatibility....
John Mueller Jul 31, 2015
★★★ Do user comments really harm your SEO?
User comments can enhance a page if their quality is high. However, a large number of low-value comments can dilute the perceived quality of the page content....
John Mueller Jul 31, 2015
★★ Do absolute or relative URLs really affect your crawl budget?
Using absolute or relative URLs does not impact Google's crawl budget. The important factor is that Google can access the correct URLs, especially if the site is available under different variations....
John Mueller Jul 31, 2015
★★★ Why can blocking your CSS and JS kill your Google indexing?
Google runs JavaScript and interprets CSS files to understand how a site appears in a browser. If Google cannot execute these files, some content may not be indexed, leading to rendering issues in sea...
John Mueller Jul 30, 2015
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