To write comment in SASS is exactly the same way you write in your css document file. There are two types of comments available in SASS, one is multiple comments and the other one is a single comment. The different in commenting in SASS is if you use only single line comment which is identified by double forward slash //, it will be ignored when we compile it to the css output file. While if it is a group comment which is identified by those comment code line /* your comment */, it will be keep in the css output file. Please see the example below and how it output result will be.