HTML Comments are a coder’s way to leave notes (i.e. comments) in the source code of the HTML page and/or keep things hidden from the browser. If there’s any HTML that you want to keep hidden from the the browser, just wrap it with an HTML Comments tag. <!– … –>
Comments [in ANY programming language] are a good way to explain code to yourself and other coders. They are also a good way to hide experimental code, code under construction, code that isn’t quite perfect, etc. If you need to hide anything, COMMENT IT OUT!
Code comments are also a fun way for coders to geek out and have a little fun. See?
<html> <head> </head> <body> <h1>The <!-- BAD --> Good Boy</h1> <p>Once upon a time, there was a very <!-- BAD --> good boy, and all he did was <!-- stay in the house --> go outside and <!-- play video games --> read books all day.</p> <!-- Blah. Blah. Blah. Blah. Blah. Blah. Blah. --> </body> </html>