SEOptimer’s HTTP2 Usage Tool verifies if your website is using the HTTP/2 protocol, which offers improved performance over older versions.
HTTP is a technology protocol used by web browser to communicate with websites and is a cornerstone of the world wide web. HTTP/2 (and above) are newer versions of the HTTP protocol that offer significant peformance improvements. Older websites may be set to using an older HTTP protocol despite their web servers having been upgraded to support newer versions.
It is worth reviewing whether your website is configured to use the latest available HTTP protocol as it can provide immediate Page Load Speed improvements.