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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🕒 ~1 min 🎯 5 questions
★★★ Is it really necessary to index the internal search pages on your site?
Internal search pages can be indexed if they are relevant and useful to users, similar to category pages. It is recommended to only select certain important queries and block the rest to avoid an infi...
John Mueller Mar 12, 2021
★★ Do the API and Search Console interface really display the same data?
The data from the Search Console interface and the API comes from exactly the same internal database at Google. It is not a different dataset, but the same data available in different ways....
John Mueller Mar 12, 2021
★★ Should you really redirect your old AMP URLs to the new ones?
Redirecting old AMP URLs to the new ones is ideally recommended, but it's less critical than for normal pages. Google refreshes the AMP cache quickly and notices URL changes within a few days....
John Mueller Mar 12, 2021
★★★ Can hreflang really be used across multiple distinct domains?
Hreflang should not be used solely within the same domain. It is possible to use hreflang across different domains to indicate language versions of content....
John Mueller Mar 12, 2021
★★ Is it necessary to redirect your AMP URLs during a change?
When changing AMP URLs, redirections are less critical than for standard URLs because Google refreshes the AMP cache quickly. The delay between discovery and update is a few days, but it is still reco...
John Mueller Mar 12, 2021
★★★ Can hreflang really be used across multiple distinct domains?
Hreflang does not necessarily have to be limited to a single domain. It is possible to use hreflang across different domains to indicate the relationships between the linguistic or regional versions o...
John Mueller Mar 12, 2021
★★★ Should you really remove expired pages or can you leave them labeled 'expired'?
For classified ad sites with ephemeral content, two approaches are acceptable: redirecting to the category (soft 404) or returning a 404. In both cases, the page disappears from the results. You shoul...
John Mueller Mar 12, 2021
★★ Can reducing page size really enhance your crawl budget?
If you improve Core Web Vitals by reducing page size, it can enhance your crawl budget. If Google can access HTML pages faster and render them more quickly, it can crawl more of them. However, it also...
John Mueller Mar 12, 2021
★★★ Should you really delete or redirect expired content instead of keeping it indexable?
For classified sites with expired content, either redirect to the category page (soft 404) or return a 404 error. Both options remove the page from search results. Do not keep old pages labeled 'expir...
John Mueller Mar 12, 2021
★★ Do Core Web Vitals Really Influence Google's Crawl Budget?
If Google can access HTML pages faster due to improved Core Web Vitals, it may potentially crawl more. This also depends on the site's capacity and Google's demand....
John Mueller Mar 12, 2021
★★ Can toxic user-generated content really penalize your entire site on Google?
Hateful or vulgar comments can harm the site beyond violations of monetization policies, with the potential to damage your brand and offend your user base....
Martin Splitt Mar 10, 2021
★★★ Should you really mark all user-generated content links with rel='ugc'?
Mark user-generated content links (in comments or forums) with the rel='ugc' attribute. This discourages comment spam and prevents these links from being associated with your site....
Martin Splitt Mar 10, 2021
★★★ Can user-generated content really sabotage your SEO?
Google may not always differentiate between site-created content and user-generated content on the same page. Spam in comments can therefore impact the site's overall ranking....
Martin Splitt Mar 10, 2021
★★ Should you really double hreflang with JavaScript for geolocation?
Beyond hreflang, implement JavaScript detection to show a banner to American users on the European site, offering them the US version. This compensates for cases where hreflang does not work perfectly...
John Mueller Mar 05, 2021
★★ Do JSON requests really impact your crawl budget?
All requests to the server via Googlebot's infrastructure, including JSON files, count towards the crawl budget. However, many JSON requests do not necessarily imply a limitation on crawling regular c...
John Mueller Mar 05, 2021
★★★ Are city-specific pages really just doorway pages doomed by Google?
Creating pages for each city with largely identical content risks being viewed as doorway pages. Google's systems may become confused, and the webspam team could see this as excessive, especially if t...
John Mueller Mar 05, 2021
★★★ Should you really implement hreflang right at the launch of a multi-country site with similar content?
To launch a USA site separate from the international English site with initially similar content, it is strongly recommended to implement hreflang at least on important pages (homepage, main categorie...
John Mueller Mar 05, 2021
★★★ How can you compel Google to refresh your JavaScript and CSS files during rendering?
To force Google to update JavaScript and CSS resources during rendering, use a content hash in the URL of the files. This way, Google will identify the new files, unlike persistent cache with identica...
John Mueller Mar 05, 2021
★★ Will Core Web Vitals Change Again, and How Can You Prepare for Upcoming Updates?
Google plans to update Core Web Vitals metrics approximately once a year, notifying webmasters in advance. It's important to submit feedback to the Chrome team when calculations seem incorrect....
John Mueller Mar 05, 2021
★★★ Should you really block JSON files in your robots.txt?
Blocking the crawl of JSON files via robots.txt will prevent the indexing of content that is visible only after rendering on pages that require these JSON files, both on your site and on third-party s...
John Mueller Mar 05, 2021
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