HTML Headings

Headings are defined with the <h1> to <h6> tags.
<h1> defines the largest heading. <h6> defines the smallest heading.
<h1>This is a heading</h1>
<h2>This is a heading</h2>
<h3>This is a heading</h3>
 

Headings Are Important

Use the HTML heading tags for headings only. Don't use headings to make something BIG or bold.
Search engines use your headings to index the structure and content of your web pages.
Since users may skim your pages by its headings, it is important to use headings to show the document structure.
H1 headings should be used as main headings, followed by H2 headings, and less important H3 headings, and so on.

HTML Comments

Comments can be inserted in the HTML code to make it more readable and understandable. Comments are ignored by the browser and not displayed.
Comments are written like this:
<!-- This is a comment -->