HTTP/2 and HTTP/3 are modern versions of the HTTP protocol that significantly improve on the older HTTP/1.1 standard, enabling multiple requests to be processed simultaneously over a single connection and reducing overall page load latency.
HTTP/3 specifically uses a newer underlying transport protocol (QUIC) that further reduces connection setup time and improves performance particularly on unreliable or high-latency mobile networks.
Since both protocols directly support faster page loading, and Googlebot supports crawling over both, ensuring a site’s server and CDN are configured to use the modern protocol version is a worthwhile technical performance improvement.
Protocol configuration is reviewed as part of our Technical SEO service.