DigitalOcean provides cloud products for every stage of your journey. Get started with $200 in free credit! The & is an extremely useful feature in Sass (and Less). It’s used when nesting. It can be a nice time-saver when you know how to use it, or a bit of a time-waster when you’re struggling and could have written the same code in regular CSS. Let’s see if we can really understand it. Basic Nest