Google Search Advocate John Mueller debunks a theory that the faster speed of HTTP/3 can directly impact a website’s SEO.
This topic is addressed during the November 2022 edition of Google’s SEO office-hours Q&A session.
Joined by the Google Search Relations team, Muller answers the following question:
Could the use of HTTP/3 improve SEO because it improves performance?
HTTP/3 offers performance benefits over HTTP/2 and HTTP/3. However, the performance gains are unlikely to make a difference regarding SEO.
Mueller On The SEO Impact Of HTTP/3
Mueller begins his response by stating Google doesn’t use HTTP/3 as a ranking factor or in web crawling:
“Google doesn’t use HTTP/3 as a factor in ranking at the moment. As far as I know, we don’t use it in crawling either.”
Google primarily uses HTTP/1 for web crawling. Googlebot supports HTTP/2 but only uses it when there’s a clear benefit over HTTP/1.
Support for HTTP/3 is likely a long way off. Websites that choose to adopt it early won’t see a direct improvement in search rankings, Mueller explains:
“In terms of performance, I suspect the gains users see from using HTTP/3 would not be enough to significantly affect the core web vitals, which are the metrics that we use in the page experience ranking factor. While making a faster server is always a good idea, I doubt you’d see a direct connection with SEO only from using HTTP/3. Similar to how you’d be hard pressed to finding a direct connection to using a faster kind of RAM...
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