What is Adaptive Cruise Control in the Audi A7?

I am interested in the technology behind the Audi A7. Can anyone explain what Adaptive Cruise Control is and how it works in this car?

Adaptive Cruise Control is a feature that uses radar sensors and cameras to maintain a safe distance from the vehicle in front of you. It can also slow down the car and even bring it to a complete stop if necessary.

In the Audi A7, Adaptive Cruise Control also has the ability to accelerate the car back up to the set speed once traffic starts moving again. It's a great convenience feature for highway driving.