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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★★★ Why does a link without an indexed URL essentially do nothing for your SEO?
For a link to exist in our systems, we always need a source and a destination, and both sides must be canonical URLs that are indexed. If we don't have any source in our systems, the link disappears b...
John Mueller Mar 28, 2022
★★★ Why does robots.txt prevent Google from crawling your pages but still allow them to be indexed?
With robots.txt, you prevent crawling of these URLs but not their indexation. If you run a site: search for these specific URLs, you'll very likely still find them in the index, even without the conte...
John Mueller Mar 28, 2022
★★★ Should you really prefer noindex over disallow to control indexation in Google?
If these are pages you don't want indexed, using noindex would be better than disallow in robots.txt. Noindex is a meta robots tag on the page, and you must allow crawling for it to work....
John Mueller Mar 28, 2022
★★★ Should you use rel=canonical instead of noindex to handle similar content?
To manage closely related content such as a blog article and a documentation page on the same subject, it is preferable to use the canonical tag rather than noindex. This allows search engines to unde...
Gary Illyes Mar 24, 2022
★★ Does the target attribute in links really have an impact on Google SEO rankings?
Google completely ignores the 'target' attribute in HTML links because it only concerns browser behavior (opening in a new tab, frame, etc.). Only the 'href' attribute matters for crawling. A link wit...
John Mueller Mar 22, 2022
★★★ Why Is Google Refusing to Index a Technically Perfect Website?
More and more sites are technically correct (sitemaps, internal links) but Google doesn't index all their content because the quality bar is rising. It's no longer enough to be technically sound and s...
John Mueller Mar 22, 2022
★★ How many links should you really place on your homepage to optimize crawl budget?
The homepage is typically the most visited page on a site. Changing the number of links on this page can alter crawl depth and impact overall site performance in search results....
Martin Splitt Mar 22, 2022
★★★ Is a sitemap really essential for Google to crawl your website effectively?
Providing a sitemap to Google is essential. Without a sitemap, Google must guess which pages exist on the site. Although Google is sophisticated and can discover pages on its own, it is far more effic...
Martin Splitt Mar 22, 2022
★★★ Does internal linking really show Google which pages matter most on your site?
Internal linking allows you to signal to Google what matters on your site. For seasonal or priority content, you need to create visible links from your home page. Google follows these signals to deter...
John Mueller Mar 22, 2022
★★★ Discovered but not indexed: Has Google really never crawled these pages at all?
When a page appears as 'discovered - currently not indexed' in Search Console, it means Google has seen a link to it but has not yet crawled it. The next step would be 'crawled - not indexed' before e...
John Mueller Mar 22, 2022
★★★ Do you really need to force server-side rendering for all JavaScript applications?
Server-side rendering or dynamic rendering are not systematically required for JavaScript applications. These solutions should only be considered if concrete data demonstrates a real indexation proble...
Martin Splitt Mar 22, 2022
★★★ Why are your CSS background images invisible to Google Images?
Images embedded via the CSS 'background-image' attribute are generally not detected for Google Images. Google focuses on the img tag with its src attribute, the picture element, or direct links to ima...
John Mueller Mar 22, 2022
★★★ Do structured data errors really block your pages from being indexed?
A page can be indexed even if structured data is incomplete, incorrect, or absent. A page can even be indexed if the HTML is completely broken. Schema.org errors absolutely do not block a page from be...
John Mueller Mar 22, 2022
★★★ Does Google really choose page titles independently of what users actually search for?
Page titles displayed in search results are now chosen based on the page itself, rather than on the user's search query. You can use a 'site:' search to see the currently indexed title and resubmit th...
John Mueller Mar 22, 2022
★★★ Does Google really index JavaScript as well as traditional HTML?
Google is capable of understanding and indexing applications rendered client-side in JavaScript. If a page appears in search results and generates traffic in Search Console, this proves that Google ha...
Martin Splitt Mar 22, 2022
★★★ Can a 500 Error on Your robots.txt Really Block Your Entire Site Crawl?
Still in this hangout, John Mueller indicated that if, when the bot attempts to read a site's robots.txt file, it received a server error (5xx type) via a CDN or not, this resulted in a loss of displa...
John Mueller Mar 21, 2022
★★★ Should you really remove the meta keywords tag from all your websites?
Googlebot pays no attention whatsoever to the content of the meta keywords tag, regardless of what values it contains. This tag is completely ignored by Google's indexing process....
John Mueller Mar 15, 2022
★★★ Does Your Robots.txt Really Need to Return 404 or 200 to Keep Googlebot Happy?
The robots.txt file must return the correct response code. If it doesn't exist, the server must return 404. If a server error is returned, Google treats it as a problem and won't crawl the site. This ...
John Mueller Mar 14, 2022
★★ Does your homepage distance really impact how fast Google indexes your pages?
Pages closer to the homepage are generally indexed faster. For most sites, the homepage is the central point, but for some, this can be a specific major category or product....
John Mueller Mar 14, 2022
★★★ Should you still trust the site: operator to diagnose your indexation status?
The numbers displayed by site: queries are not intended for diagnosis. They are not a reflection of what is actually indexed, but merely a quick approximation. The figures can be wrong by several orde...
John Mueller Mar 14, 2022
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