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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★★ What are the best ways to bounce back quickly from temporary server errors in SEO?
After temporary server errors, Google promptly re-crawls the most important URLs, and the situation generally normalizes in about a week. There are no lasting penalties following this type of incident...
John Mueller Jul 09, 2021
★★★ Why are soft 404s on desktop hiding in Search Console?
Search Console displays soft 404s detected on mobile. If a page is considered a soft 404 only on desktop, it does not appear in Search Console, even if the page is not indexed for desktop searches....
John Mueller Jul 09, 2021
★★★ Is there really no delay between Google's crawling and indexing?
There is no queue or artificial delay between crawling and indexing at Google. If a page can be crawled, Google tries to index it as quickly as possible, except for JavaScript sites that require pre-r...
John Mueller Jul 09, 2021
★★★ Why should you prioritize HTML tables for indexing specific values?
If the goal is to index specific values from charts, it is better to present this data in the form of HTML tables. This way, Google can process them through normal crawling and potentially display the...
John Mueller Jul 09, 2021
★★★ Should you use canonicals for URLs with similar parameters?
For URLs with parameters that display similar content, it is recommended to use rel=canonical pointing to the clean URL. This helps Google understand which version to index and prevents the dilution o...
John Mueller Jul 09, 2021
★★★ Is it true that Google de-indexes after prolonged 5xx errors?
Google recommends a 503 code for a maximum of one day, sometimes two. After two days of server errors, Google begins to de-index URLs, starting with the most visible as these are the ones crawled most...
John Mueller Jul 09, 2021
★★★ Why does Google treat soft 404s differently on mobile and desktop?
Google has a system that detects soft 404s separately for mobile and desktop. A page can be considered soft 404 on desktop but normal on mobile, creating different indexing based on the device....
John Mueller Jul 09, 2021
★★★ Could a product canonical to category be harming your product content?
When a canonical tag points from a product page to a category page, the signals (links) are transferred, but the content of the product page is completely ignored. Only the content of the category pag...
John Mueller Jul 09, 2021
★★★ How does Google really handle infographics for SEO?
Google does not break down charts, infographics, or data visualizations to extract individual values. These elements are treated like standard images, indexable for image search but without a detailed...
John Mueller Jul 09, 2021
★★ Why doesn't server-side rendering boost your SEO the way you think it does?
Server-side rendering only changes the way existing content is delivered. It's not a magical technique for improving keyword rankings, but it can enhance speed if properly implemented....
John Mueller Jul 09, 2021
★★ Does changing your CDN really affect Google's crawling?
Changing the site's infrastructure (like the CDN) results in a decrease in the crawl rate. Google becomes conservative after an infrastructure change to avoid causing problems and then gradually incre...
John Mueller Jul 09, 2021
★★★ What essential elements should you keep during a website redesign to protect your SEO?
During a redesign, it is important to keep as many elements as possible: the same URLs, internal linking, content, and layout. If these elements change without redirects, Google treats the site as new...
John Mueller Jul 09, 2021
★★★ Could separate mobile sites be the reason your indexing is slowing down?
Having separate versions (desktop, mobile, app) of a site slows down indexing because Google has to crawl three versions instead of one. Switching to a responsive design accelerates the process by red...
John Mueller Jul 09, 2021
★★ Why does geographic targeting take a week in Google Search Console?
Geographic targeting settings in Search Console take about a week to propagate to Google's various systems. The effect is first visible on new content and then gradually on existing content during the...
John Mueller Jul 09, 2021
★★ Why do old URLs still show up after a migration?
After migrating URLs, a site: search might still display old URLs even if Google has already migrated the indexing. Google aims to be helpful by showing where the content used to be located. Checking ...
John Mueller Jul 09, 2021
★★★ How does Google really detect spam in its search results?
Google's algorithms are highly effective at detecting spam. In most cases, Google automatically identifies spam and removes it from search results. Manual actions are taken only in specific cases to s...
Google Jul 08, 2021
★★★ How does Google narrow down results to just 10,000 before reordering them?
Ranking works by first retrieving relevant results from the index, then limiting the set to about 1,000-10,000 results by applying basic signals (PageRank, topical relevance). After that, advanced alg...
Gary Illyes Jul 06, 2021
★★ Why are ranking scores relative to a specific set of results?
Ranking scores are relative to the specific set of results for a query, not to the overall index. A score of 0.76 can be the best score for a given set of results....
Gary Illyes Jul 06, 2021
★★★ Should you use JavaScript to control indexing for single page apps?
For single-page applications, use JavaScript to dynamically add a noindex robots meta tag to the DOM for pages that should not be indexed. Avoid using robots.txt as Google would then index the URL wit...
John Mueller Jul 02, 2021
★★★ Should you choose rel nofollow over the PRG pattern for managing PageRank?
To prevent a link from passing PageRank, simply use rel nofollow. Do not use complex constructs like the PRG (Post-Redirect-Get) pattern that add unnecessary complexity, are hard to maintain, and prev...
John Mueller Jul 02, 2021
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