What is Audi A7's auto start-stop system and how does it work?

I've heard about the auto start-stop system in the Audi A7, but I'm not sure how it actually works. Can you explain it to me in detail?

The auto start-stop system in the Audi A7 is designed to improve fuel efficiency and reduce emissions. Essentially, when you come to a stop, the system automatically shuts off the engine, and then restarts it when you release the brake pedal. This is especially useful in stop-and-go traffic, as it reduces unnecessary idling and saves fuel. It may take some getting used to, but it's a great feature once you understand how it works.