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 merge two cannibalizing pages or let them coexist?
When faced with two competing pages on the same topic, merging via canonical is wise if they struggle to rank (boost visibility). Conversely, if both pages are already ranking in the 1st or 2nd positi...
John Mueller May 14, 2020
★★ Can you really combine canonical and noindex without risk?
Combining canonical and noindex on the same page is theoretically contradictory (one says 'index the other', the other says 'don’t index anything'). In practice, Google does not block this dual signal...
John Mueller May 14, 2020
★★★ Why do old URLs stay indexed after a 301 redirect?
When changing a URL with 301 redirects, Google does not remove the pages from the index: it simply switches from the old URL to the new one as canonical. If traffic massively drops after a migration, ...
John Mueller May 13, 2020
★★ The 50,000 URLs in a sitemap: why does this limit not mean what you think it does?
The limit of 50,000 URLs in a sitemap applies only to the main URL tags (loc tag), not to additional attributes like hreflang, images, or videos. There is also a file size limit. You can create multip...
John Mueller May 13, 2020
★★★ Why does your hreflang markup still not work despite your efforts?
For hreflang to work, Google must see the markup on both linked pages. If an English page points to a Spanish page, the Spanish page must also point to the English page. If the language versions are i...
John Mueller May 13, 2020
★★ Does the URL Parameter Tool really consolidate all signals as Google claims?
By configuring a parameter as 'Representative URL' in the Search Console parameter tool, Google consolidates all signals from URLs with that parameter to a unique representative version. This can redu...
John Mueller May 13, 2020
★★★ Why does your site completely disappear from Google's index, and how can you recover it?
If a site no longer appears at all in the results (even for the brand name), there are three possible causes: a severe technical problem on the site, a manual action by the Web Spam team, or the accid...
John Mueller May 13, 2020
★★ Do UTM parameters really cause Google to index duplicate content?
URLs with UTM parameters (Facebook, Twitter) can be indexed as duplicates even if the canonical is correct. Google will eventually consolidate these versions to the canonical version. To accelerate or...
John Mueller May 13, 2020
★★ Does the outdated content tool really just hide the snippet instead of affecting indexing?
If critical information (like an old phone number) persists in the results, the outdated content tool allows for temporary removal of the snippet or waiting for the result to be updated, without deind...
John Mueller May 13, 2020
★★★ What happens when your internal linking isn't bidirectional?
For Google to crawl the entire site, it requires links that allow for descending through the hierarchy (to subcategories), ascending back up, and navigating horizontally between items in the same cate...
John Mueller May 13, 2020
★★★ Does Hreflang really only affect displayed URLs while Google insists on indexing just one version?
Hreflang does not influence indexing: Google may index a single version of similar content (canonical), but displays the appropriate URL based on the search country. In Search Console, only the canoni...
John Mueller May 13, 2020
★★★ Does the URL removal tool truly deindex your pages?
The URL removal tool in Search Console hides URLs from search results but does not immediately remove them from the index. They continue to be counted in the Index Coverage report until Google fully r...
John Mueller May 13, 2020
★★★ Why does Google refuse to index all your pages, and how can you fix it?
Google does not promise to index all pages on the web. On a new site with a sudden influx of content, systems may be cautious and limit crawling and indexing. Submitting via Inspect URL does not guara...
John Mueller May 13, 2020
★★★ Is the site: command really useless for diagnosing indexing?
The number of results displayed by the site: command is optimized for speed, not accuracy. To diagnose indexing, one must rely on the Index Coverage report from Search Console, which accurately reflec...
John Mueller May 13, 2020
★★★ Are 301, 302, and JavaScript redirects really equivalent for SEO?
For Googlebot, there is no practical difference between a 301, 302, or client-side JavaScript redirect. Googlebot follows JavaScript redirects and treats them as normal redirects. There is no client-s...
Martin Splitt May 12, 2020
★★ Is SSR + client hydration really safe for Google SEO?
Frameworks with hydration (server-side rendering followed by client hydration, like Next.js/Nuxt) are acceptable. Even if some components only function on the client side, it’s not an issue as long as...
Martin Splitt May 12, 2020
★★★ Should you ditch dynamic rendering for better SEO results?
Google no longer actively recommends snapshot/dynamic rendering tools like Rendertron. It is a workaround, not a sustainable solution. If JavaScript is problematic for Googlebot, it likely is for user...
Martin Splitt May 12, 2020
★★★ Is it true that Googlebot overlooks your WebP images served by Service Worker?
If you are using a Service Worker to serve WebP images instead of JPEG/PNG (by detecting browser support), Googlebot will not see the WebP because it does not execute Service Workers. Even if third-pa...
Martin Splitt May 12, 2020
★★★ Is server-side rendering truly essential for Google SEO?
Server-side rendering (SSR) is not required for Googlebot as Google executes JavaScript and sees the content rendered on the client-side. However, SSR is highly recommended because it improves speed f...
Martin Splitt May 12, 2020
★★★ Are JavaScript redirects truly equivalent to 301 redirects for Google?
There is no 301 redirect on the client side: the 301 code is a server HTTP status. However, you can create a client-side JavaScript redirect. Googlebot follows these redirects and treats them similarl...
Martin Splitt May 12, 2020
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