What is the purpose of Audi A8's four-wheel steering system?

I have heard that the Audi A8 has a four-wheel steering system. Can someone explain what this system does and how it benefits the car's performance?

The four-wheel steering system on the Audi A8 allows for improved handling and stability while driving. This is achieved by allowing the rear wheels to turn in the opposite direction of the front wheels at low speeds, making the car more agile and easier to maneuver.

In addition to improved handling, the four-wheel steering system also helps to reduce the car's turning radius. This is especially useful when navigating tight spaces or parking in tight spots.

The Audi A8's four-wheel steering system also offers a smoother and more comfortable ride by reducing vibrations and absorbing bumps on the road.