What does the adaptive cruise control feature do in the Audi A6?

I recently purchased an Audi A6 and noticed it came with an adaptive cruise control feature. What exactly does this feature do and how does it work?

The adaptive cruise control feature in the Audi A6 uses radar sensors to maintain a safe distance from the vehicle in front of you. It automatically adjusts your speed to keep a safe following distance.

In addition to maintaining a safe distance from the car ahead of you, the Audi A6's adaptive cruise control also has the ability to accelerate and decelerate for you in stop-and-go traffic.