Good news if you have been waiting for Googlebot to support HTTP/2.  According to John Mueller, they are working on bringing the support soon.

In today’s Google Webmaster Office Hours, Mueller was asked whether there were crawling or indexing limitations for sites moving from HTTP/1 to HTTP/2

So at the moment, Googlebot doesn’t support HTTP/2-only crawling, so if your website is only accessible via HTTP/2 – that’s the next version of HTTP –  then we wouldn’t be able to crawl that properly.

We are working on that, I suspect it will be ready by maybe the end of this year or early next year, something around that.

One of the big advantages around HTTP/2 is that you can bundle requests so if you are looking at a page and it has a bunch of embedded images, CSS, JavaScript files, those things, theoretically you can do one request for all of those files and get everything together.  So that would make it a little bit easier to crawl pages when we are rendering them, for example.

If you are wanting to utilize HTTP/2, it looks as though you won’t be waiting too much longer for the support.