HTML - heading, line, comment tag

HTML Headings
Headings are important in HTML documents.
Headings are defined with the <h1> to <h6> tags.

Example
<h1>This is a heading</h1>
<h2>This is a heading</h2>
<h3>This is a heading</h3>

HTML Lines
The <hr /> tag creates a horizontal line in an HTML page.

Example
<p>This is a paragraph</p>
<hr />
<p>This is a paragraph</p>
<hr />
<p>This is a paragraph</p>

HTML Comments
Comments are written like this:

Example
<!-- This is a comment -->