What is the Quattro permanent all-wheel drive system in the Audi A8?

I heard that the Audi A8 has a Quattro permanent all-wheel drive system, but I am not sure what it means. Can someone explain how this system works and if it provides any advantages for the car's performance or handling?

The Quattro permanent all-wheel drive system is a technology that distributes power to all four wheels of the Audi A8, providing better traction and stability in various driving conditions. This means the car can handle better on different road surfaces, such as wet or snow-covered roads.