HTML HEADING
HTML defines six levels of headings. A heading element implies all the font changes, paragraph breaks before and after, and any white space necessary to render the heading. The heading elements are h1, h2, h3, h4, h5, and h6 with h1 being the highest (or most important) level and h6 the least. don't use headings to make text BIG or bold , Search engines use your headings to index the structure and content of your web pages.
EX<html> <head> <title> Heading tags </title> <body> <h1> HTML is programming language </h1> <hr> <h2> HTML is programming language </h2> <hr> <h3> HTML is programming language </h3> <hr> <h4> HTML is programming language </h4> <hr> <h5> HTML is programming language </h5> <hr> <h6> HTML is programming language </h6> </body> </html>