Headings help in defining the hierarchy and the structure of the web page.
Example:In this page “HTML heading Tutorial with Example” is the heading and it write between h1 tag.
Headings are defined with the <h1> to <h6> tags. <h1> defines the most important heading. <h6> defines the least important heading.
h1 tag play a vital rule for know your website page in search engines .Search engines use the headings to index your web page.
<h1> headings should be used for main headings, followed by <h2> headings, then the less important <h3>, and so on.
The head tag is the container of meta tag and css file.