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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★★★ Should you really return a 404 or 410 on hacked URLs to speed up their de-indexing?
To reduce the number of invalid URLs after an attack, return a 404 or 410 code. Googlebot will stop exploring them after determining they are no longer valuable....
John Mueller Dec 10, 2019
★★ Do you really need to manage two different HTTP codes for deindexing?
A 410 code informs Google that the content has been permanently removed, which can speed up its deindexing. However, the difference in effect compared to a 404 code is often minimal....
Martin Splitt Dec 10, 2019
★★★ Is it really necessary to return a 404 or 410 status to block the crawling of URLs on a hacked site?
To get Googlebot to stop crawling URLs on a hacked site, it is recommended to configure them to return a 404 or 410 status code. This allows Google to reduce the crawling frequency of these obsolete U...
John Mueller Dec 10, 2019
★★★ Are tracking parameters in your URLs sabotaging your crawl budget?
Using tracking parameters in product URLs without a visible direct link to the canonical versions can affect crawl budget and lead to indexing of parameterized versions....
John Mueller Dec 10, 2019
★★★ Should you really limit Googlebot's crawl on your server?
Limit Googlebot's requests if your server is experiencing too many requests. This will help Googlebot prioritize crawling important URLs....
John Mueller Dec 10, 2019
★★★ Is it true that Google displays a different URL than the one it canonizes internationally?
For international sites with similar content for different markets, it is common for Google to choose a canonical URL while still showing the appropriate URL through hreflang in search results....
John Mueller Dec 10, 2019
★★★ Do hreflang tags really prevent canonicalization between identical regional content?
When identical content is present across regional English versions, a phenomenon of canonicalization may occur. Nevertheless, Google will display the correct version in search results if hreflang tags...
John Mueller Dec 10, 2019
★★★ Does the URL Removal Tool really de-index your pages?
The URL Removal Tool does not de-index content but temporarily hides it from search results. It remains essential to manage 404s to stop crawling....
John Mueller Dec 10, 2019
★★★ How can you manage URL parameters without diluting your crawl budget?
The URL parameter management tool helps Google ignore certain parameters that do not impact content, thus improving the crawling and indexing of priority pages....
John Mueller Dec 10, 2019
★★★ Are Cookie Interstitials Blocking Your Website's SEO Performance?
The same John Mueller indicated, also on Twitter, that the fact that a website displays interstitials showing legal texts (example: cookie acceptance) is not a problem as long as Google can read the c...
John Mueller Dec 09, 2019
★★★ Does duplicate content really dilute SEO value across multiple sites?
Using the same content across multiple sites dilutes the value of the content in Google's eyes, making each site less competitive. Duplicate content is not necessarily a penalty but rather a dilution ...
John Mueller Dec 06, 2019
★★★ Do 404 errors on your images and embedded content really affect your crawl and ranking?
Google indicates that unexpected 404 errors generated from links in embedded content do not affect the site’s crawl and ranking if images are correctly indexed. 404 errors are quickly processed withou...
John Mueller Dec 06, 2019
★★★ Should you really test indexability before migrating to React or another JavaScript framework?
Implementing JavaScript frameworks such as React can have a significant impact on SEO. It's advisable to conduct tests on pages before proceeding with a full migration to ensure that content remains i...
John Mueller Dec 06, 2019
★★ Do attachment pages really hurt your site's SEO?
Attachment pages do not penalize a site if they add value. They must provide a positive and relevant user experience to justify their indexing by Google....
John Mueller Dec 06, 2019
★★★ What does it mean when Google says 'Indexed URL but...'? Is there a reason to worry?
When a page has issues as indicated by Search Console ('URL is indexed by Google, but...'), it often means a problem with AMP or structured data. Check and fix these specific elements....
Google Dec 05, 2019
★★★ How can you check if your site has switched to Mobile-First Indexing?
To verify if a page has been properly migrated to Mobile-First Indexing (MFI), check the 'Coverage' section of the Search Console. If the 'Main Crawler' is marked as 'Smartphone', this indicates a mig...
Google Dec 05, 2019
★★★ How does migrating to HTTPS affect your HTTP indexing, and what can you do to prepare for it?
When migrating to HTTPS, expect a decrease in the indexing of HTTP pages. Ensure that the SSL configuration is correct and that the redirects from HTTP to HTTPS are properly in place....
Google Dec 05, 2019
★★★ Does image lazy-loading really hurt Google’s indexing?
Using lazy-loading for images (loading="lazy") is recognized by Google and does not affect the bot’s ability to index pages. However, pay attention to the impact on perceived loading time for users....
Google Dec 05, 2019
★★ Can you really index a URL blocked by robots.txt?
Google can index the URL even if its content is blocked by robots.txt, assuming that the content might be relevant based on the internal or external links pointing to it....
John Mueller Nov 28, 2019
★★★ Should you really adjust the crawl rate to handle traffic spikes like Black Friday?
Adjusting the crawl rate in Search Console can take effect the next day, but for an event like Black Friday, this may be too late if actions are taken at the last minute. To prevent the crawler from t...
John Mueller Nov 28, 2019
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