Quick summary: Starting November 2020, Googlebot will start crawling some sites over HTTP/2.
Ever since mainstream browsers started supporting the next major revision of HTTP, HTTP/2 or h2 for short, web professionals asked us whether Googlebot can crawl over the upgraded, more modern version of the protocol.
Today we’re announcing that starting mid November 2020, Googlebot will support crawling over HTTP/2 for select sites.
As we said, it’s the next major version of HTTP, the protocol the internet primarily uses for transferring data. HTTP/2 is much more robust, efficient, and faster than its predecessor, due to its architecture and the features it implements for clients (for example, your browser) and servers. If you want to read more about it, we have a long article on the HTTP/2 topic on developers.google.com.
In general, we expect this change to make crawling more efficient in terms of server resource usage. With h2, Googlebot is able to open a single TCP connection to the server …read more