I searched before but I couldn't get a logical answer. I want to know what's the use of < HTML > tag in HTML? Why do we use this tag and how is this useful?

CodePudding user response：

You don't. Look at the specification. It says:

An html element's start tag can be omitted if the first thing inside the html element is not a comment.

An html element's end tag can be omitted if the html element is not immediately followed by a comment.

That said, if you don't have it, you can't put a lang attribute that applies to the whole document on it.