Do you know what is Sass? Sass (Syntactically Awesome StyleSheets) is a scripting language that is interpreted into Cascading Style Sheets (CSS). It allows you to keep your CSS code very simple and helps increase readability. It is simply a different way to work with CSS.
The official implementation of Sass is open-source and coded in Ruby, however, other implementations exist, including PHP, and a high-performance implementation in C called libSass. There’s also a Java implementation called JSass.