What is the Audi A8's Quattro all-wheel drive system and how does it work?

I've heard that the Audi A8 has a Quattro all-wheel drive system, but I'm not sure what that means or how it works. Can someone explain it to me?

The Quattro all-wheel drive system in the Audi A8 is what sets it apart from other luxury sedans. It uses a center differential to distribute power to each wheel individually, allowing for better traction and handling in various road conditions. On slippery roads, for example, the system can automatically redirect more power to the wheels with the most grip.