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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★★★ Does lazy loading really harm your content's indexing by Google?
When rendering a page, Google uses a fairly high viewport and indexes everything that loads within this viewport. If content requires a specific action (scroll, click on 'Read more'), it will probably...
John Mueller Oct 29, 2020
★★★ Do 302 redirects really turn into 301s over time?
Google eventually treats 302 redirects as permanent redirects (301) when they persist over time. This is considered a 'soft 301' from Google's perspective....
John Mueller Oct 29, 2020
★★ Is it true that Google still indexes Flash content, or should everything be migrated to pure HTML?
Google indexes pages with Flash solely based on the visible HTML content in the rendered DOM, not content within Flash files. The removal of Flash from browsers should not affect site traffic as Googl...
John Mueller Oct 29, 2020
★★★ Is it really necessary to avoid any migration following a failed domain migration?
During a problematic domain migration, the one thing you must absolutely avoid is another migration. Internal changes to the site are acceptable, especially if they don't involve modifying URLs....
John Mueller Oct 29, 2020
★★★ Should you really hide cookie consent banners from Googlebot?
Blocking Googlebot from cookie consent banners does not lead to a manual penalty, as long as the main content remains identical for users and for Google. Banners implemented in JavaScript or HTML abov...
John Mueller Oct 29, 2020
★★★ Should you really block cookie banners for Googlebot?
Blocking cookie banners for Googlebot is not considered cloaking and will not result in a manual penalty. In most cases, these banners are implemented in JavaScript or HTML, and Google can index the m...
John Mueller Oct 29, 2020
★ Should You Really Limit the Number of Outbound Links on a Web Page?
For years, Google has indicated that there is no limit to the number of outbound links (internal or external) on a web page that are read by the search engine's robots. However, Gary Illyes indicated ...
John Mueller Oct 27, 2020
★★★ Does Publishing First Really Guarantee Google Will Recognize You as the Original Author?
John Mueller indicated on Twitter that the fact that Google indexes content first does not make that content original and "canonical". In other words, just because a spammer plagiarizes your content b...
John Mueller Oct 27, 2020
★★★ Why does Google insist that you upload ALL your inventory to Merchant Center?
It is recommended to upload the complete product inventory to Google Merchant Center for products sold online and offline. This allows for quicker data updates (prices, stock levels), provides richer ...
Daniel Waisberg Oct 20, 2020
★★★ How can you create effective product pages that truly impress Google?
You need to create pages on the site that explain the products for sale, called Product Detail Pages (PDP). These pages must include high-quality images with a neutral or transparent background from v...
Daniel Waisberg Oct 20, 2020
★★★ Why Can Google Penalty Reconsideration Reviews Take Anywhere from 1 Week to Several Months?
John Mueller indicated on Twitter that the timeframe for processing a reconsideration request for a site that has received a manual action could vary from one week to several months, without any real ...
John Mueller Oct 19, 2020
★★★ Can exchanging content for backlinks trigger a Google penalty?
Exchanging product reviews for backlinks can be seen as a problematic link exchange by Google's Web Spam team. It is recommended to use nofollow links in this case to avoid being interpreted as purcha...
John Mueller Oct 16, 2020
★★ Why do your rendering tests fail while Google indexes your page correctly?
Google's testing tools (Mobile-Friendly Test) have shorter timeouts than actual indexing to provide quick answers. If rendering works in the URL Inspection tool but not in the tests, it’s likely a tim...
John Mueller Oct 16, 2020
★★ Should you really think twice before splitting your site into multiple domains?
Dividing a site into multiple domains is even more challenging than merging sites. Google generally recommends concentrating content rather than splitting it, unless there are very good business reaso...
John Mueller Oct 16, 2020
★★ Should you really host your news blog on the same domain as your product site?
To add a news section to a product site, it is recommended to keep it on the existing domain rather than creating a new domain. This allows for immediate benefit from the authority of the site. A clea...
John Mueller Oct 16, 2020
★★ Is splitting a website into multiple domains a strategic mistake to avoid?
Separating a website into multiple domains is almost harder than merging sites, as the internal linking changes completely. Google generally recommends focusing content rather than splitting it, unles...
John Mueller Oct 16, 2020
★★★ Can Google really evaluate Core Web Vitals section by section on your site?
Google tries to be as granular as possible in assessing Core Web Vitals. If your site has a clear structure (subdirectories or subdomains), Google can treat slow and fast sections differently. Without...
John Mueller Oct 16, 2020
★★★ Does a domain migration really transfer all ranking signals?
During a simple domain migration (one-to-one), Google typically transfers all ranking signals. Google has worked long to make these migrations as smooth as possible, and in most cases, they work very ...
John Mueller Oct 16, 2020
★★ Do you really need to specify a time zone in the lastmod tag of your XML sitemap?
The last modified date in an XML sitemap must include a time zone according to the datetime standard. Using 'Z' indicates UTC, but other time zones can be specified. Google uses this data as a guide t...
John Mueller Oct 16, 2020
★★★ Does a 1:1 domain migration truly transfer ALL ranking signals?
During a simple domain migration (one-to-one), all ranking signals are transferred. Google has worked long to make these migrations as seamless as possible, and they generally work very well....
John Mueller Oct 16, 2020
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