What does the Audi A8's all-wheel steering do?

I've heard that the Audi A8 has an all-wheel steering feature, but I'm not sure what it does or if it's worth it. Can someone explain?

Hi Sarah, the all-wheel steering on the Audi A8 allows the rear wheels to turn slightly in the opposite direction of the front wheels when making turns at low speeds. This increases maneuverability and makes parking easier. It also improves stability at higher speeds. Overall, it's a great feature to have and I highly recommend it.