1. CSS Comments are used to explain the logic or code and may help when you edit the source code at a later stage.
2. CSS Comments are always ignored by web browsers.
3. A CSS comment is placed inside the <style> element, and starts with /* and ends with */

Example:-

/* This is a single-line CSS comment */
h2 { background-color: green; }

You can add comments as follows wherever you want in the code:

Example
h2 { background-color: yellow; /* Set text color to yellow */ }

Comments can also span multiple lines:?

Example
/* This is
a multi-line
comment */

h2 { color: brown; }