Why i habe to use header,why i cant use only <h1>tag

Answer 1

Definition and Usage. The <header> element represents a container for introductory content or a set of navigational links. A <header> element typically contains: one or more heading elements (<h1> - <h6>) logo or icon.
http://www.html-5-tutorial.com/header-element.htm

Answer 2

because header tag has different uses other than heading tags(h1-h6) , head open the link for description

Answer 3

but cant we just use h1-h6

Answer 4

got that.....