You don't have to put anything in a head tag, you don't even need a head tag, but it's a good idea to have one and to at least add a charset meta tag. Everything is optional, though.
The entire point of it is for you to share metadata about your page with the browser.
You don't have to put anything in a head tag, you don't even need a head tag, but it's a good idea to have one and to at least add a charset meta tag. Everything is optional, though.
The entire point of it is for you to share metadata about your page with the browser.