Ever heard Saas or Less? (for frontend developer)
What is it for?
I read the article and still do not understand the purpose.
SAAS usually means Software As A Service.
LESS in reference to CSS is a CSS extension. Some call it a pre-processor.
You may want to correct your question because not everyone may guess you really meant to ask about the other extension SASS.
Also, I don't see any burning reason to pick either pre-processor. You didn't from what I can read from your discussions here.