<h1> - <h6>
tag
Six levels of section headings. <h1> is the highest (most important) and <h6> is the lowest.
Syntax
<h1>Heading</h1>
Example
html
<h1>Main Page Title</h1>
<h2>Section Heading</h2>
<h3>Subsection</h3>
<h4>Sub-subsection</h4>
<h5>Minor heading</h5>
<h6>Smallest heading</h6>