How does the Audi A7's Quattro drivetrain work?

I've been looking into buying a new Audi A7 and I've heard about the Quattro four-wheel drive but I'm not sure how it works and if it's worth the extra cost. Could someone explain it to me?

The Quattro all-wheel drive system in the Audi A7 is proven and well-regarded among drivers, providing superior traction and stability in all weather conditions. With its advanced torque vectoring capabilities, the system ensures that power is distributed effectively to all four wheels for maximum performance on the road. In my opinion, it's definitely worth the investment for the added safety and control it provides, especially in adverse driving conditions.