HTML allows comments in code through comment tags. Single line comments use <!-- and --> surrounding the comment. Multiple line comments use the same tags with the closing --> on its own line to indicate the end of the comment.

2. HTML Comments
HTML Comment Tags for single line
You can add comments to your HTML source by using the following syntax:
<!-- Write your comments here -->
HTML Comment Tags for multiple line
You can add comments to your HTML source by using the following syntax:
<!-- Write your comments here
Write more-->