What is the difference between the head and header in HTML 5?

Answer 1

The head tag is not visible , it is the part before the body where you put Meta infos, links to scripts css files or cdns,... in.
The header is a visible element (normaly a div you give the id header) inside your body.

Answer 2

The head of HTML is the part that the user does not see it, which are loaded their links to style or meta tags. Since the header is the visual part of your site, the top part you edit the structure and shows the user your site

Answer 3

Thanks