Comment tags <!-- and --> are used to insert comments in HTML.
HTML Comment Tags
You can add comments to your HTML source by using the following syntax:
<!-- This is a comment -->
Note: There is an exclamation point (!) in the opening tag, but not in the closing tag.
- Comments are not displayed by the browser, but they can help document your HTML. With comments you can place notifications and reminders in your HTML:
- Comments are also great for debugging HTML, because you can comment out HTML lines of code, one at a time, to search for errors:
<p>This is a paragraph.</p> <!-- Remember to add more information here -->
You might stumble upon conditional comments in HTML:
<!--[if IE 8]> .... some HTML here .... <![endif]-->
Conditional comments defines HTML tags to be executed by Internet Explorer only.