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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★★★ Is it really possible to show different interstitials based on traffic source without SEO risk?
Google devalues mobile pages displaying intrusive full-screen interstitials. Showing a partial interstitial (e.g., lower third) to organic visitors while displaying a full screen to other channels is ...
John Mueller Jul 24, 2020
★★ Should you really nofollow your menu links to optimize crawling?
To prevent Google from following internal menu links, the nofollow attribute can be used. However, in most cases, it is unnecessary to hide these links. If a page should not be indexed, it's better to...
John Mueller Jul 24, 2020
★★★ Should you really set noindex for low-content user profile pages?
User profile pages with little content generally do not drag a site down. Google focuses on important pages. Noindex is only useful if profiles are exploited by spammers or if their massive volume (mi...
John Mueller Jul 24, 2020
★★ Do image metadata really influence rankings in Google Images?
Google indexes certain image metadata, primarily to display licensing and copyright information in Google Images. This metadata does not constitute a ranking factor but is useful for providing legal i...
John Mueller Jul 24, 2020
★★★ Should You Block 404 Error Pages in Your Robots.txt File?
John Mueller indicated on Twitter that it would be a very bad idea to block pages that return 404 errors from search engine crawling, adding that Googlebot attempts to crawl billions of URLs that retu...
John Mueller Jul 20, 2020
★★★ Should you really unblock all CSS files in robots.txt to avoid a Google penalty?
Google must be able to access CSS files to render pages correctly. This is essential for determining whether a page is mobile-friendly. Although CSS files are generally not indexed on their own, Googl...
John Mueller Jul 20, 2020
★★★ Should you really create your robots.txt from scratch or can you take inspiration from a competitor?
You shouldn't simply reuse someone else's robots.txt file assuming it will work for your site. Instead, think about the parts of your site that you really don't want crawled, and block only those....
John Mueller Jul 20, 2020
★★ Should you really block server configuration files in robots.txt?
Configuration files such as PHP.ini or .htaccess are not accessible from the outside by default. They are secured or located in a special place. If no one can access them, Googlebot cannot either. The...
John Mueller Jul 20, 2020
★★ How does content hashing in URLs truly enhance your crawl budget?
To optimize caching and crawl budget, use content hashes in file names (e.g., application.AEF3CE.js) instead of generic names. This allows Google to cache resources indefinitely, and only new hashes w...
Martin Splitt Jul 14, 2020
★★★ Does the crawl budget really boil down to the simple sum of two variables?
The crawl budget consists of two elements: crawl rate (the speed at which Google can crawl without overloading the server) and crawl demand (crawl frequency based on content change frequency and not i...
Martin Splitt Jul 14, 2020
★★ Can you really make Google crawl your site more often?
Webmasters cannot ask Google to crawl more. Google automatically detects server capacity and adjusts the crawl. It is only possible to limit crawling, not to increase it. Google's scheduler is smart e...
Martin Splitt Jul 14, 2020
★★★ Does the crawl budget truly impact the rendering phase of your JavaScript pages?
The crawl budget affects not only the initial crawl but also the rendering, as Google needs to fetch additional resources (CSS, JavaScript, API). A poor cache can force Google to continuously re-downl...
Martin Splitt Jul 14, 2020
★★★ Does crawl budget really only concern very large sites?
Crawl budget should only be a concern for sites with millions of URLs. For sites with fewer than one million pages, crawl budget is generally not an issue unless the server infrastructure is failing....
Martin Splitt Jul 14, 2020
★★ Should you ditch POST for crawlable APIs and switch everything to GET?
Google cannot cache POST requests, leading to greater crawl budget consumption. For rendering APIs, use GET requests. GraphQL can be employed to reduce the number of requests, but only in GET mode....
Martin Splitt Jul 14, 2020
★★★ How does Google really detect content changes on your site?
Google employs several signals to determine crawl frequency: content fingerprint, structured data with dates, ETag, HTTP Last-Modified header, and modification date in the sitemap. If these signals do...
Martin Splitt Jul 14, 2020
★★ Should you canonicalize pages that share the same content but look visually different?
When displaying pages with the same text that appears different depending on the user, if the basic content is the same but the layout and appearance differ, canonicalizing is optional. However, it is...
金谷武明 Jul 02, 2020
★★ Should you really forgo a JavaScript fallback for native lazy loading?
When using the img element's loading="lazy" attribute (native lazy loading), there is no need to prepare a fallback for Googlebot since JavaScript is unnecessary....
金谷武明 Jul 02, 2020
★★ Could the canonical URL change based on a visitor's geolocation?
It is fundamentally difficult to imagine that the canonical URL could be representative of different conditions such as location. The canonical does not fluctuate based on any conditions....
小川安奈 Jul 02, 2020
★★ Should you be worried about the difference between / and /index.html?
If both a URL ending with '/' and '/index.html' exist on the domain's homepage and there are no redirects or canonical settings, Google recognizes them as separate URLs. One will be chosen as canonica...
金谷武明 Jul 02, 2020
★★★ Why will your hash (#) URLs never be indexed by Google?
URLs containing a hash (#) cannot be crawled or indexed by Google. For temporary content (e.g., sports match) to be findable in search before or during the event, clean routes without a hash must be u...
Martin Splitt Jul 01, 2020
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