It is a way to generate CSS without going crazy. &quot;Sass is a scripting language that is interpreted into Cascading Style Sheets (CSS). [...] The newer syntax, &quot;SCSS&quot;, uses block formatting like that of CSS.&quot;<p>Ref: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sass_%28stylesheet_language%29" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Sass_%28stylesheet_language%29</a>