Introduction HTTP/2 was published in May 2015. The advantage of HTTP/2 is its high transfer speed for content-rich websites. Most probably your website serves tons of CSS, JS and images, so why not using HTTP/2?
Main features of HTTP/2 All requests are downloaded in parallel without forming a queue. HTTP headers are compressed. Pages are fetched as a binary, not as a text file, which is more efficient. Prerequisites NGINX 1.