What is a Quattro system and how does it work?

I've been hearing a lot about Audi's Quattro system and how it improves driving performance, but I'm not quite sure how it really works. Can someone explain it to me in simple terms?

The Quattro system is a type of all-wheel drive technology used in Audi vehicles. It is designed to distribute power evenly between all four wheels, improving traction and handling on various road surfaces. Basically, it helps you stay in control and ensures a more stable and balanced driving experience.