What Does Syntactically Awesome Stylesheets (Sass) Mean?
Syntactically Awesome Stylesheets (Sass) is an extension to Cascading Style Sheets (CSS) that adds more features, stability and depth on top of CSS. It differs from CSS in that it supports variables, nested rules, inline imports, mixins and inheritances.
Techopedia Explains Syntactically Awesome Stylesheets (Sass)
Sass is an advanced variant of CSS that is completely compatible with all versions of CSS. It uses Sass Script as the scripting language.