Headings are defined with the
<h1> defines the most important heading.
<h6> defines the least important heading.
Search engines use the headings to index the structure and content of your web pages.
Users often skim a page by its headings. It is important to use headings to show the document structure.
<h1> headings should be used for main headings, followed by
<h2> headings, then the less important
<h3>, and so on.
you can specify the size for any heading with the
style attribute, using the CSS