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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★★ Do the default sitemaps in WordPress Core really change the game for SEO?
Sitemaps are now part of the WordPress core. This means that any site using WordPress can submit a default sitemap file. Sitemaps are widely supported by search engines and help in crawling and indexi...
John Mueller Sep 29, 2020
★★★ Why did Google delay the final switch to mobile-first indexing, and what are the real risks for you?
The final date for mobile-first indexing has been postponed to late March 2021, given the circumstances. This gives the remaining sites more time to make the necessary changes....
John Mueller Sep 29, 2020
★★★ Should you really favor noindex over canonical for e-commerce facets?
For e-commerce facets that are not important landing pages, it is better to use noindex rather than rel canonical. Canonical indicates that the pages are equivalent, whereas noindex clearly states not...
John Mueller Sep 25, 2020
★★★ Does mobile-first indexing really ignore the desktop version of your site?
When a site is switched to mobile-first indexing, the main version indexed by Google is the mobile version. Google counts impressions for the primary version and exchanges language URLs, but not deskt...
John Mueller Sep 25, 2020
★★★ Should you really index all paginated pages to avoid losing products?
Putting a noindex on paginated pages (starting from page 2) can prevent Google from discovering the products present on these pages and the following pages. It is recommended to allow the indexing of ...
John Mueller Sep 25, 2020
★★★ Is server-side rendering truly free from any cloaking penalty risks?
Serving pre-rendered HTML to Googlebot and dynamic JavaScript content to users is not considered cloaking as long as the final content is identical. This is an acceptable method known as server-side r...
John Mueller Sep 25, 2020
★★ Is it true that Search Console only analyzes a portion of your site’s pages?
The aggregated reports in Search Console (mobile usability, structured data, speed) are based on a sample of site pages, not on all indexed pages. The size of this sample may decrease without indicati...
John Mueller Sep 25, 2020
★★ Does Google really test its updates before deploying them in production?
During the launch of Evergreen Googlebot, Google did not just test in production. The team ensured that they would not cause negative effects to websites before deployment, demonstrating a responsible...
Martin Splitt Sep 23, 2020
★★★ Could your meta tags be hiding from Google without you even knowing?
Some third-party scripts inject tags (e.g. iframe) at the top of the <head>, which can lead Google to believe that the <head> is prematurely closed. Result: robots metatag, canonical, hreflang may be ...
John Mueller Sep 14, 2020
★★ Should you consider using Prerender for serving static HTML to Googlebot?
Using a service like Prerender to serve static HTML to Googlebot instead of letting Google render JavaScript can reduce technical risks during migrations or changes. It is not required, but it can sta...
John Mueller Sep 14, 2020
★★ Is footer content really treated as standard content by Google?
Content placed in the footer is treated like normal content located at the bottom of the page, provided that it is legible and not hidden. Google performs a viewport expansion during rendering and det...
John Mueller Sep 14, 2020
★★ Why is Google planning to remove the 'crawl anomaly' category from Search Console?
Google is working on removing the generic 'crawl anomaly' category in Search Console. Instead of grouping various issues, the data will be reclassified into more specific and useful categories. This c...
John Mueller Sep 14, 2020
★★★ Do internal links really play a role in Google ranking?
Creating internal links from old pages to new or relevant pages improves SEO. This helps Google crawl the site, understand which pages are important (the most linked), and better distribute internal a...
John Mueller Sep 14, 2020
★★ Is it true that a JavaScript migration can ruin your indexing due to cache issues?
During a domain migration of a client-side JavaScript site, Google may struggle to render pages correctly if JavaScript resources are cached from the old URL. This can lead to rendering failures and i...
John Mueller Sep 14, 2020
★★ Is it true that Google really ignores your tracking scripts during rendering?
Google ignores certain scripts during rendering if they are not necessary for displaying the page. Google Analytics and other common analytics scripts are automatically detected and skipped to speed u...
John Mueller Sep 14, 2020
★★ Restoring a 404 URL: Does Google Really Wipe All Traces of Its Past Authority?
When a previously 404 URL returns to a 200 status, Google treats it like a fresh URL with no 'score' or 'authority' retained from the old version once it has been deindexed. However, external signals ...
John Mueller Sep 14, 2020
★★★ Should you include or exclude Googlebot from your A/B tests without risking a penalty?
It is acceptable to include Googlebot in a temporary A/B test (e.g., menu change) or to exclude it by treating it as a special category (based on geolocation, language, capabilities). If separate URLs...
John Mueller Sep 14, 2020
★★ How does Google really deindex an expired site or one that’s globally 404?
When a site becomes 404 or expires, Google does not immediately deindex all pages. Frequently crawled pages (homepage, categories) disappear quickly, while others do so more slowly. Google attempts to...
John Mueller Sep 14, 2020
★★ Should you really choose the 410 code over 404 for quick deindexing of a page?
The 410 (Gone) code removes pages from the index slightly faster than the 404, but in the long term, the difference is theoretical and negligible. For urgent removal, using the removal tool in Search ...
John Mueller Sep 14, 2020
★★ How does Google really detect duplicate content with fingerprinting?
Google creates a digital fingerprint of the content and uses similarity metrics to determine if two pages are duplicates. If about 95% of the content is identical (e.g., the same product description w...
Martin Splitt Sep 09, 2020
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