What is adaptive cruise control on the Audi A5?

I have heard about adaptive cruise control on the Audi A5, but I am not sure what it does or how it works. Can someone explain it to me?

Adaptive cruise control is an advanced safety feature that uses sensors to detect the speed and distance of vehicles ahead of you. It then adjusts your car's speed accordingly to maintain a safe following distance.

Think of it as a smarter version of regular cruise control. It can adjust your speed and even come to a complete stop, making rush hour traffic much less stressful.