What is Audi A4's adaptive cruise control system and how does it work?

I've heard about adaptive cruise control on the Audi A4 but I'm not sure what it does or how it works. Can you provide a brief explanation?

The adaptive cruise control system in the Audi A4 uses sensors and cameras to automatically maintain a safe following distance from other vehicles on the road. It works by monitoring the speed and distance of the vehicle in front of you, and adjusting your car's speed accordingly.

With Audi A4's adaptive cruise control, you can set a desired speed and following distance, and the car will automatically accelerate and brake to keep you at a safe distance from the vehicle ahead. It's a great feature for long highway drives or stop-and-go traffic in the city.