Heading are defined by <h1> to <h6>
<h1> tag is used for most important title and <h6> is used for very least important.
Headings is limited between <h1> to <h6>.
Text after, <h6> become normal text for <h7>, <h8> and so on.
<!DOCTYPE html> <html> <body> <h1>Heading 1</h1> <h2>Heading 2</h2> <h3>Heading 3</h3> <h4>Heading 4</h4> <h5>Heading 5</h5> <h6>Heading 6</h6> </body> </html>