How does the Audi A8's all-wheel steering affect handling?

I've heard that the Audi A8 has an all-wheel steering system. How does this system work and how does it improve the car's handling?

The Audi A8's all-wheel steering system utilizes rear-wheel steering to improve handling and maneuverability. The rear wheels can turn up to 5 degrees in the opposite direction of the front wheels at lower speeds, making the car more agile in tight spaces. At higher speeds, the rear wheels turn in the same direction as the front wheels, providing better stability and control while cornering.