The code to use headings tag in html
<!DOCTYPE html>
<html>
<head>
<title>Headings</title>
</head>
<body>
<h1>Headings1</h1>
<h2>Headings2</h2>
<h3>Headings3</h3>
<h4>Headings4</h4>
<h5>Headings5</h5>
<h6>Headings6</h6>
</body>
</html>
Check the tutorial here
link:- https://youtu.be/rkfbIVRppZM