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 above-the-fold loading time overshadow total page loading time?
For SEO, the speed at which above-the-fold content loads is more critical than the total page loading time. Google focuses on the speed of initial rendering for a better user experience....
Google Jun 15, 2017
★★★ How Long Can You Use a 503 Code Before Risking Deindexation?
John Mueller reminded us on Twitter that using a 503 code (Service Unavailable) is not a problem if it's implemented for a few hours (for a quick maintenance operation, for example), but it should not...
John Mueller Jun 12, 2017
★★★ Does Google Simply Ignore Spammy Links or Do They Trigger Penalties?
Gary Illyes indicated on Twitter that if links were not recognized as "blatant attempts to manipulate" the search engine's algorithm, there was a strong chance they would be purely and simply ignored ...
Gary Illyes Jun 12, 2017
★★★ Is it really necessary to submit all domain variations in Search Console?
Submitting all variations of a domain in Search Console allows you to receive notifications in case of issues with any of the versions....
John Mueller Jun 12, 2017
★★★ How can you know exactly how Google sees and understands your web page?
John Mueller explained on Twitter that if you want to know how Google sees your web page, it's better to use Search Console (Crawl section > Fetch as Google) than the "Cached" option available in sear...
John Mueller Jun 06, 2017
★★★ Does Nofollow Really Burn Your Crawl Budget?
John Mueller indicated on Twitter that using a "nofollow" attribute on links does not "burn" crawl budget for a website. Fortunately so. We can even say that this technique is rather beneficial in thi...
John Mueller Jun 06, 2017
★★★ Are drops in traffic after migration really tied to the domain change?
During a site migration, especially with country code top-level domains, ensure that all redirects are properly set up. Traffic fluctuations may not be solely related to the migration but also to a ge...
John Mueller Jun 02, 2017
★★★ How Many Pages from the Same Website Can Appear in Google Results?
John Mueller indicated on Twitter that the same site can appear multiple times (with different pages) on the same results page. There is no (longer any) limit to the number of URLs from the same site ...
John Mueller May 29, 2017
★★ Should You Really Disavow All Links Coming from Spammy Sites?
John Mueller indicated that links from "spammy" sites are not necessarily unnatural. And that the priority should be to track down (and disavow) unnatural links. He also explained that you can have na...
John Mueller May 22, 2017
★★★ Does Google really render all JavaScript pages for SEO?
Google tries to render almost all pages, including those using JavaScript. It is recommended to keep separate versions of JavaScript files to facilitate the updating and proper rendering of pages....
John Mueller May 17, 2017
★★★ Does Google Really Keep All Your Past SEO Mistakes in Memory Forever?
When asked whether Google could forget certain practices performed by a website in the past, John Mueller replied that the search engine had "a lot of storage space". We can confirm this: Google forge...
John Mueller May 15, 2017
★★ Can sitemap errors really slow down your site's crawl?
When errors are found, Google will periodically attempt to recrawl these erroneous URLs. A sitemap error does not affect rankings, but it can slow down the crawling process if it prevents quick detect...
John Mueller May 05, 2017
★★ Subdomains or Directories: Which Technical Structure Should You Favor for Indexing?
From a technical perspective, you can use either subdomains or directories to structure a website. The only recommendation is to minimize the number of domains used, as it complicates indexing and man...
John Mueller May 05, 2017
★★ Does Domain Age Really Impact Google Rankings?
John Mueller indicated on Twitter that the age (seniority) of a domain name is not a relevance criterion for Google's algorithm (although this is a deeply rooted belief in the SEO community). It's pos...
John Mueller Apr 24, 2017
★★★ Should You Really Remove the Priority Parameter from Your XML Sitemaps?
Gary Illyes indicated on Twitter that the priority indexing parameters in XML Sitemap files were a "bag of noise." Basically, this indication serves no purpose and, for once, we completely agree with ...
Gary Illyes Apr 10, 2017
★★★ Can a new domain really rank number one quickly?
A new domain can rank number one. No minimum period is required; the age of the domain is not a limiting factor as long as the content is relevant and of high quality....
John Mueller Apr 07, 2017
★★★ Should you really remove your old redirects to boost your SEO?
Maintaining a redirect from one domain to another can be done indefinitely without negative SEO impact. Removing it might be considered for practical reasons but not for SEO purposes....
John Mueller Apr 07, 2017
★★★ Do toxic links really affect your Google ranking?
Google is quite effective at ignoring low-quality links. Most links from spammy sites do not affect how a site is ranked in search results....
John Mueller Apr 07, 2017
★★★ Do redirects from subdomains to external sites really hurt your SEO?
Using redirects on subdomains to send visitors to external pages is acceptable from an SEO perspective, especially if this setup aids marketing efforts. There is no penalty associated with this type o...
John Mueller Apr 04, 2017
★ Do You Really Need Backlinks for Google to Crawl Your Pages?
John Mueller indicated on Twitter that if a page had no backlinks, Googlebot would not crawl it. This is obviously false since a URL can be identified by the search engine via the XML Sitemap or be su...
John Mueller Apr 03, 2017
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