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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★★★ How can you manage duplicate content between two sites without harming their indexing?
If you want to index two sites that share content, make sure each site has meaningful unique content. Otherwise, use canonical tags to indicate your indexing preference....
John Mueller Aug 25, 2017
★★★ Can structured data markup kill your rich snippets without affecting your rankings?
Incorrect structured data markup can lead to manual actions, which might remove the rich snippets without affecting the overall site ranking....
John Mueller Aug 25, 2017
★★ How can you speed up the deindexing of orphan pages that drag down your Google index?
URLs that are no longer linked but still indexed can take time to be naturally deindexed. Using a sitemap with current modification dates can accelerate the discovery process to deindex these pages....
John Mueller Aug 24, 2017
★★ Should you really set noindex on sparsely populated category pages?
It is advised to carefully manage product category pages that have very few items by potentially setting them to noindex to avoid them resembling 404 pages, which would cause Google to consider them u...
John Mueller Aug 24, 2017
★★★ Should you block JavaScript scripts in your robots.txt?
Blocking JavaScript scripts in the robots.txt file may be inconsequential if these scripts do not contain essential content for indexing. However, if key elements such as links to stores on a map are ...
John Mueller Aug 24, 2017
★★ Should you really rely on 404 errors to clean up Google’s index of orphaned URLs?
Unlinked but still indexed URLs will be gradually re-crawled by Google and removed from the cache if they return a 404 status code....
John Mueller Aug 24, 2017
★★ Does descriptive content on category pages really solve the indexing issue?
Adding individual texts to product category pages helps users and Google better understand the diversity. Pages with uniform content will not pose a problem for under-indexing....
John Mueller Aug 24, 2017
★★★ Does the canonical tag really transfer as much signal as a 301 redirect?
The canonical tag helps indicate which URL is the preferred version for indexing similar content across multiple domains. It works similarly to a 301 redirect in terms of signal transfer....
John Mueller Aug 24, 2017
★★★ How does Google actually determine which pages to crawl first on your site?
Google automatically adapts its crawling based on criteria like frequent changes on the page or the importance of the page to the site. Homepages and category pages are generally crawled more often th...
John Mueller Aug 24, 2017
★★★ Should you really avoid using canonical tags on paginated pages?
It is not recommended to use a canonical tag pointing to the first page of a paginated series, as each page contains distinct content. Each page should be treated as a unique entity....
John Mueller Aug 24, 2017
★★★ 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
★★★ Are mouseover links truly crawlable by Google?
The way mouseover navigation links are implemented affects their ability to be crawled by Google. If the links are visible once the page loads, there is no issue. However, if the links are generated o...
John Mueller Aug 24, 2017
★★ Should you really avoid canonicals pointing to page 1 on paginated series?
Using canonicals on paginated pages pointing to the first page is generally not recommended, as this may overlook the distinct content present on each page....
John Mueller Aug 24, 2017
★★ Does duplicate content really affect your site's crawl budget?
Google effectively manages the crawling of reasonably large sites even with duplicate content, but this can become an issue for very large sites or on slow servers....
John Mueller Aug 24, 2017
★★★ Should you really make your JavaScript files accessible to Googlebot?
JavaScript files that are important for loading content on a page must be accessible to Google; they should not be blocked in the robots.txt if this prevents Google from accessing relevant content....
John Mueller Aug 24, 2017
★★★ Can Google Really Handle JavaScript Indexing Effectively?
Googlebot typically processes JavaScript-built sites well, but it has limitations, such as the lack of support for features like service workers. Using Progressive Enhancement or polyfills can help en...
John Mueller Aug 24, 2017
★★★ Do canonical tags really transmit SEO signals like a 301 redirect?
Canonical tags act like 301 redirects to transmit SEO signals and are treated as recommendations indicating which URL should be indexed. This also applies across domains, but all signals must be consi...
John Mueller Aug 24, 2017
★★★ Are category pages really crawled more by Google?
Google automatically adapts the crawling of pages according to their importance and update frequency. Main pages like the homepage and category pages are often crawled more frequently because they are...
John Mueller Aug 24, 2017
★★★ Do empty category pages really harm indexing?
Category pages with few products can remain indexed. Only those with no products at all may be treated as soft 404 errors and thus potentially non-indexed....
John Mueller Aug 24, 2017
★★★ Is JavaScript really a challenge for Google’s crawling?
Google can generally manage major sites using JavaScript well unless the execution of each page requires a specific service worker, which could be an issue....
John Mueller Aug 24, 2017
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