How does the Audi A8's all-wheel steering system work and what are the benefits?

I am looking to purchase an Audi A8 and am intrigued by the all-wheel steering system. Can you explain how it works and what advantages it offers over traditional steering systems?

The all-wheel steering system in the Audi A8 utilizes an electric motor to turn the rear wheels up to 5 degrees in the opposite direction of the front wheels at low speeds, making the car more agile and easier to maneuver in tight spaces. At high speeds, the rear wheels turn in the same direction as the front wheels for improved stability and handling.