The comment tag is an element used to leave notes, mostly related to the project or the website. This tag is frequently used to explain something in the code or leave some recommendations about the project. The comment tag also makes it easier for the developer to come back and understand the code he's written at a later stage. Comments can also be used for commenting out lines of code for debugging purposes.
Comments are started with `<!--` and ended with `-->`, and can span multiple lines. They can contain code or text, and won't appear on the front-end of the website when a user visits a page. You can view comments through the Inspector Console, or by viewing Page Source.
### Example
```html
<!-- You can comment out a large number of lines like this.
These comments are only available in Internet Explorer and can be used up to IE9. In current times, there is a good chance you will never see them, but it is good to know about their existence as they do exist on some older sites. Conditional Comments are a way to serve a different experience for different client browsers. For example: