Comment tags are used to insert comments in the HTML source code.

You can add comments to your HTML source by using the following syntax:

Example

<!-- Write your comments here -->

 

Notice that there is an exclamation point (!) in the opening tag, but not in the closing tag.

Note: Comments are not displayed by the browser, but they can help document your HTML source code.

With comments you can place notifications and reminders in your HTML:

<!-- This is a comment -->

<p>This is a paragraph.</p>

<!-- Remember to add more information here -->

 

Comments are also great for debugging HTML, because you can comment out HTML lines of code, one at a time, to search for errors:

<!-- Do not display this at the moment
<img border="0" src="pic_mountain.jpg" alt="Mountain">
-->

 

You might stumble upon conditional comments in HTML:

Example

<!--[if IE 9]>
    .... some HTML here ....
<![endif]-->
          

 

Conditional comments defines some HTML tags to be executed by Internet Explorer only.