What does Google say about SEO? /
This category compiles all official Google statements regarding JavaScript and technical aspects of search engine optimization. Modern JavaScript frameworks (React, Angular, Vue.js) and web application architectures (SPA, SSR, CSR) present critical challenges for crawling and indexing. Google's guidance on JavaScript rendering, dynamic DOM manipulation, AJAX implementation, and API calls is essential for ensuring client-side content visibility. SEO professionals will find authoritative positions on implementation best practices, differences between server-side and client-side rendering, and recommendations for optimizing load times while guaranteeing content accessibility to search crawlers. Understanding data formats (JSON, XML) and their SEO implications completes this vital resource. These official declarations help prevent common technical implementation mistakes that can severely impact the search performance of modern websites and JavaScript-powered applications. Access to Google's verified positions on these technical matters enables practitioners to make informed architectural decisions and implement JavaScript solutions that maintain strong organic search visibility while delivering enhanced user experiences.
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★ Why does Search Console only show partial data for the News section at launch?
Data for the News section in Search Console (for News mode in Search, not Google News App) only goes back to around July 2020, which is when data collection began. For older sites, this view will be l...
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
★★★ Do blog backlinks to product pages really convey authority?
Creating internal links from a blog (that naturally attracts backlinks) to the product or category pages of an e-commerce site is a recommended practice. The backlinks obtained by the blog help streng...
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
★★ Is third-party JavaScript slowing down your site: Does Google really hold you accountable for ranking?
If a third-party JavaScript (e.g., advertising) significantly slows down a page, Google will measure this slowdown when evaluating speed for ranking, without making a distinction between site code or ...
John Mueller Sep 14, 2020
★★★ Does the alt attribute still play a role in web page SEO?
The alt attribute should accurately describe the content of the image (e.g., transcribe a quote if the image is a quote). Google uses the alt to understand the image for Image Search, not for traditio...
John Mueller Sep 14, 2020
★★ Is it really necessary to switch from Blogger to WordPress to boost your SEO?
Hosting a blog on Blogger with a custom domain is perfectly acceptable for SEO. There is no SEO advantage to migrating to WordPress. The Blogger infrastructure provides stability and automatic mainten...
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
★★ 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
★★ Does Google Tag Manager affect your content to the point of impacting your SEO?
If the 'container tag' refers to Google Tag Manager, Google processes it during the page rendering. GTM can add, modify, or remove content via JavaScript. Using URL Inspection allows you to see the re...
John Mueller Sep 14, 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
★★★ Are Google’s manual penalties always visible in Search Console?
If a manual action has been taken by Google's Webspam team, it will almost always be visible in Search Console. There are a few rare edge cases where this would not be displayed, but for a normal site...
John Mueller Sep 14, 2020
★★★ Are high-DA backlinks without value really harmless for your SEO?
Creating dofollow backlinks on high DA/PA sites (Domain Authority, a third-party metric) does not help SEO if these links are ignored by Google (because they are spammed by others). These efforts have...
John Mueller Sep 14, 2020
★★★ Can a blog on a subdomain really pass SEO authority to the main site?
For a blog on a subdomain (e.g., Shopify + WordPress) to pass authority to the main site, Google primarily relies on internal links and the fact that both are on the same root domain. Similar design o...
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
★★★ Does Google Really Flag Domains as "Toxic" in Its Algorithm?
John Mueller explained on Twitter that Google doesn't have a "flag" indicating that a domain name is toxic: "We don't have a concept of a toxic domain. It's good to use tools to work on your site, but...
John Mueller Sep 09, 2020
★★★ Can Google Really Block a Page's Visibility Based on Country?
John Mueller explained on Twitter that there is no system or mechanism on Google's search engine to limit a page's visibility to one country or another. For example, a page that could be visible on Go...
John Mueller Sep 09, 2020
★★★ Do Images in XML Sitemaps Count Toward the 50,000 URL Limit?
We know that XML Sitemap files are limited to 50,000 URLs. We also know that for each page URL, we can indicate the URLs of the main images it contains. But do these image URLs count as part of the 50...
John Mueller Sep 09, 2020
★★★ Why don’t the Search Console API and the web interface return the same data?
The Search Console API and the web interface use exactly the same backend. If no data is returned by the API while the interface displays it, the issue likely stems from a difference in domain verific...
John Mueller Sep 04, 2020
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