How does Audi's all-wheel steering work in the R8?

I've read that the Audi R8 has all-wheel steering, but I'm not sure how it works. Could someone explain the mechanics behind it and how it improves the car's handling?

Audi's all-wheel steering uses active rear steering to improve handling and stability. The rear wheels turn slightly in the opposite direction of the front wheels at lower speeds, making the car more maneuverable and reducing the turning circle. At higher speeds, the rear wheels turn in the same direction as the front wheels, providing better stability and cornering performance.