Technical SEO
HTTP/2
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What is HTTP/2?
HTTP/2 is the second major version of the HTTP network protocol, designed to improve performance over its predecessor HTTP/1.1. Key features include multiplexing (sending multiple requests and responses simultaneously over a single connection), and header compression, which together reduce page load latency significantly.
From an SEO perspective, HTTP/2 benefits Core Web Vitals metrics by reducing connection overhead and enabling browsers to load assets more efficiently in parallel. Most modern web servers and CDNs support HTTP/2 by default, but it requires an HTTPS connection to function in browsers. Migrating from HTTP/1.1 to HTTP/2 often yields measurable improvements in TTFB and overall page load speed without any changes to page content.
Why it matters for SEO
HTTP/2's multiplexing eliminates the per-request connection overhead that made HTTP/1.1 a bottleneck for asset-heavy pages. Faster asset loading directly improves LCP and overall page speed scores, which are factors in Google's ranking algorithm.
Example
A photography portfolio loads 60 small thumbnails. Over HTTP/1.1 the browser opens a limited number of connections per host and queues the remaining requests behind them. After the host enables HTTP/2 over HTTPS, all 60 requests are multiplexed over a single connection and download in parallel. No page content changes; the improvement comes entirely from the protocol, which you can confirm in the browser's network panel under the Protocol column (h2).
Go further with HTTP/2
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