HTTP/2 is a new version of the HTTP protocol that reduces the number of connections needed to load all the content on each page, so instead of creating many connections to load content, it will make a single one to request the content at once. HTTP/2 was introduced to deal with the increasing complexities of the modern day web. The old web protocol (HTTP/1) is slowly transitioning to HTTP/2, to allow the web to be able to handle ever more amounts of data and information in a more robust fashion. It is faster, stronger, and more capable. In fact, tests on HTTP/2 have revealed the speed of the protocol could be up to 120% faster than HTTP/1. Some of the benefits of HTTP/2 are no more source sharding, no more sprite sheeting, possible SEO improvements and more. Ultimately, HTTP/2 will give you a better website performance but there are a lot more additional benefits to it.