What are HTML comments?

Comments are used to give extra information to the person writing or updating the HTML, usually explaining what a piece of code does, or identifying a significant point in the document. Comments are not displayed on the webpage itself. They are only within the code. They are ignored by the browser. The concept of using comments comes from programming. Comments can also do other things, like get a piece of code to be ignored temporarily so that testing to see if there is a problem can be done. A comment is started by putting this <!-- and is finished by putting this --> with the comments in between them like this:

<!-- This will be ignored by the browser-->