Comments are piece of code which is ignored by any web browser.
It is good practice to comment your code, especially in complex documents, to indicate sections of a document, and any other notes to anyone looking at the code.
Comments help you and others understand your code.
HTML Comment lines are indicated by the special beginning tag <!-- and ending tag -->placed at the beginning and end of EVERY line to be treated as a comment.
Note:There is an exclamation point (!) in the opening tag, but not in the closing tag.Comment Syntax:
<!-- Write your comments here -->
<!-- Write your comments here Write your comments here -->
Conditional comments only work in Explorer on Windows, and are thus excellently suited to give special instructions meant only for Explorer on Windows.
They are supported from Explorer 5 onwards, and it is even possible to distinguish between 5.0, 5.5 and 6.0.
<--[if IE 6]> Write your comments here Write your comments here <![endif]-->
<p> Learn More <comment> and </comment> Enjoy More </p>
<script> <!-- document.write("Hello World!") //--> </script>