What is the Audi A4 Quattro system and how does it work?

I heard that the Audi A4 has all-wheel drive, but I'm not sure how it works and if it's worth the extra cost. Can someone explain it to me?

The Audi A4 Quattro system is a sophisticated all-wheel drive system that distributes power to all four wheels for improved traction and handling. It's a great option for those who often drive in challenging weather conditions.

The Quattro system uses a center differential to continually monitor and adjust the amount of power sent to each wheel, resulting in improved stability and control. It's definitely worth the extra cost in my opinion.