HEADING LEVELS

<h1>defines the largest heading. <h6> defines the smallest heading.

<h1>THIS IS H 1</h1>

<h2>THIS IS H 2</h2>

<h3>THIS IS H 3</h3>

<h4>THIS IS H 4</h4>

<h5>THIS IS H 5</h5>
<h6>THIS IS H 6</h6>

NOTE :-

&  HTML automatically adds an extra blank line before and after a heading.