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Silvia Balzan238 Points
What do you mean for meta informations about HTML doc into <head>?
HTML meaning of <head>
Giuseppe Nardella17,790 Points
The meta informations are informations about the document itself . The meta tag is used to define the author, the description, the keywords and other information that are not standardized with specific tags.
The tag <html> is the container or root of the HTML document.
The "meta" tag is used to describe the html page (document) itself. It is not visible to the user, but can be parsed by search engines for example.
Here is a good article about meta tags usage
Hope this helps