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 Google aggressively recrawl your site after a migration?
When Google detects significant changes on a site (URL structure change, domain migration), it may trigger an accelerated recrawl to quickly obtain an updated image. The site is neither paused nor rem...
John Mueller Aug 11, 2020
★★★ Should you really modify the lastmod of the sitemap to speed up recrawling after fixing missing tags?
After correcting pages missing title and meta description tags, the recommended method to speed up recrawling is to update the 'lastmod' date in the XML sitemap. This is not gaming: these pages have g...
John Mueller Aug 11, 2020
★★ Is it true that structured data makes a difference based on whether it's implemented with a plugin or manually?
Google accepts structured data implemented via a WordPress plugin, theme, manual code, or JavaScript after the page loads, with no preference. Only the validity of the final structured data counts. Fo...
John Mueller Aug 11, 2020
★★★ Why is your Search Console crawl budget skyrocketing for no apparent reason?
The number of URLs crawled per day in Search Console includes all Googlebot requests: HTML, images, CSS, JavaScript, server responses, and also checks for landing pages for Google Ads and Shopping. Th...
John Mueller Aug 04, 2020
★★ Should you create a lightweight version for Googlebot to speed up crawling?
Removing trackers and pixels to speed up the version served to Googlebot is probably not considered cloaking (akin to server-side prerendering). However, this adds no value because Google measures spe...
John Mueller Aug 04, 2020
★★ Why is your Search Console crawl budget skyrocketing for seemingly no reason?
Crawl statistics in Search Console include all crawled URLs (HTML, images, CSS, JS, server responses) and all requests passing through the Googlebot infrastructure, including checks for advertising an...
John Mueller Aug 04, 2020
★★ How can you measure Core Web Vitals when your site isn't in CrUX?
When a site does not appear in the Chrome User Experience Report, it is possible to use the Core Web Vitals JavaScript library to collect this data directly in Analytics. This approach allows you to o...
John Mueller Aug 04, 2020
★★ Should you isolate UGC and News content in subdomains to avoid penalties?
For Google to treat a News section and a forum separately on the same domain, there needs to be a clear separation: different subdomains or distinct directories (/news and /forum). User-generated cont...
John Mueller Aug 04, 2020
★★ Should you really separate sitemaps for pages and images?
A single sitemap file can contain both page URLs and images. There are limits on the number of URLs and file size, but how you divide sitemaps generally has no impact on crawling and indexing, except ...
John Mueller Aug 04, 2020
★★ Should you serve a streamlined version of your pages to Googlebot to improve crawl efficiency?
Serving a faster page to Googlebot (without trackers or pixels) is not considered cloaking and is similar to server-side prerendering. However, this practice is discouraged because it introduces unnec...
John Mueller Aug 04, 2020
★★★ Can you create local pages by city without risking penalties for doorway pages?
Creating city-specific landing pages can be acceptable if each page offers true unique value (special offers, local reviews, popular models in that city). Avoid: generic auto-generated content about t...
John Mueller Aug 04, 2020
★★ Is it really necessary to use hreflang for a multilingual website?
For versions in truly different languages (English, Spanish, German), hreflang is often not required because users search in their language and Google naturally displays the correct version. Hreflang ...
John Mueller Aug 04, 2020
★★ How does my site get included in the Chrome User Experience Report without signing up?
Inclusion of a site in the Chrome User Experience Report (CrUX) is automatic, based on a sample of Chrome traffic. There is no manual registration required. Sites can also collect their own Core Web V...
John Mueller Aug 04, 2020
★★★ Should You Use Images Instead of HTML/JavaScript Charts for SEO?
John Mueller explained during a webmaster hangout that using images (PNG, JPG or other formats) was preferable (with a properly filled ALT attribute) when displaying charts on screen compared to other...
John Mueller Aug 03, 2020
★★ Do Google's new JavaScript guides on links and navigation really change the game?
Google has expanded its documentation for JavaScript sites, adding information on links, the History API, URL fragments, and 404 pages. These resources are recommended for developers of JavaScript-bas...
John Mueller Jul 31, 2020
★★★ Is page speed really overrated as a Google ranking factor?
Page speed is a ranking factor, but it is not the most important one. Relevant content remains king. Google cannot make it such a strong factor that it would prevent displaying the most relevant conte...
Martin Splitt Jul 27, 2020
★★★ Is AMP really useless for Google ranking?
AMP is not a ranking factor. AMP simply indicates to users that they can expect a fast page. Fast non-AMP sites can outperform equivalent AMP pages. Page speed matters, not the framework used....
Martin Splitt Jul 27, 2020
★★★ How Can You Successfully Migrate Your Website Without Losing Your Organic Rankings?
John Mueller provided some insights on Reddit regarding website migration. First of all, if there are changes, they will primarily come from a new CMS and/or new content, not from a domain name change...
John Mueller Jul 27, 2020
★★★ Is it really necessary to aim for a Lighthouse score of 100 to rank better on Google?
Google does not rank pages based on a specific Lighthouse score. Pages are categorized into groups (slow, average, fast). Moving from a Lighthouse score of 90 to 95 does not make a difference for the ...
Martin Splitt Jul 27, 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
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