This page is archived
We're keeping this page up as a courtesy to folks who may need to refer to old instructions. We don't plan to update this page.
Sass is in a class of tools called CSS preprocessors. CSS preprocessors have been around for a while now, but they've really started to gain in popularity in the last several years. In this lesson we'll find out what a CSS preprocessor is, what the benefits of using one are, and which ones are popular today.