In HTML there are 6 type of headings.
That ranges from H1 to H6.
H1 defines the most important heading.
Syntax:
<H1>----------------------------</H1>
Example:
<html>
<body>
<H1> The Main Heading Name</H1>
<H2> The Main Heading Name</H2>
<H3> The Main Heading Name</H3>
<H4> The Main Heading Name</H4>
<H5> The Main Heading Name</H5>
<H6> The Main Heading Name</H6>
</body>
</html>