HTTP 3 — Shiny, New, Transfer Protocol on Steroids

HTTP/3 is coming closer to being implemented in all modern browsers and enabled on most of popular hosting platforms.

But what are the differences between it and the older HTTP/2 (HTTP/1)

Probably the biggest difference is in the transport layer protocol that is being used — in HTTP/1 and HTTP/2 it was TCP protocol but now one called QUIC will replace it.