Growing up I was always told I had sass, but that’s not what we’re talking about here! Sass in relation to coding has nothing to do with attitude, but everything to do with looks (of your website).
Okay enough joking around, Sass is a CSS pre-processor that allows you to dosome interesting stuff not normally available to you when using regular CSS. One of the big things that I see being really useful is the ability to use variables. My first introduction to coding was back-end stuff so I was used to loops, if statements and variables so I was a little lost when I switched to front-end programming and lost those tools. Sass allows you to use the tools you might be used to, and the re-compiles your code into CSS the browser can read.
Honestly I don’t see myself using Sass much now that I’m used to coding CSS regularly, but it’s good to know the option is there. If I work on a really massive site then I can see myself using Sass, but other than that I’ll probably pass on it.