What is the use of href in html

Answer 1

In <a> tag href defines the link destination .
In <base> href defines base url for all relative url in the document.
In <link> href defines the url of css file.

Answer 2

Rohan Jha href is an attribute which use with following tags to link other webpages or links to HTML page.
Tags are:
1. <a>
2.<link>
3.<base>