Comment tags are used to insert comments in the HTML source code.
HTML Comment Tags
You can add comments to your HTML source by using the following syntax:
<!– 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:
Example
<!– This is a comment –>
<p>This is a paragraph.</p>
<!– Remember to add more information here –>
