What does meta do in HTML

Answer 1

It describes metadata about an HTML document.

It is pretty much used to specify page description, author of the document, last modified, language, size of page, etc.

EDIT: Good source: https://www.w3schools.com/tags/tag_meta.asp

Answer 2

the meta tag provides metadata about the html document.Metadata will not be displayed on the page ,but it will be machine parsable.Meta elements are typically used to specify page description, keywords, author of the document,last modified,and other metadata.