HTTP/2, introduced in 2015 as a major update to the HTTP/1.1 protocol, significantly enhanced web performance by addressing key limitations of its predecessor, such as head-of-line blocking, lack of multiplexing, and lengthy headers. Derived from Google's experimental SPDY protocol, HTTP/2 introduced features like header compression, server push, and stream prioritization, which collectively improved web page load speeds and efficiency by allowing multiple requests over a single TCP connection. While HTTP/2 supports backward compatibility with HTTP/1.1 and requires adoption of HTTPS, it offers substantial benefits, including enhanced security, mobile-friendliness, and reduced reliance on alternative optimization methods like domain sharding. However, businesses should consider audience browser compatibility and the resource investment involved in transitioning, especially if their sites are already optimized for speed under HTTP/1.1. Despite its advantages, HTTP/2's relatively recent adoption means that ongoing research is necessary to fully understand its best practices and potential drawbacks.