How does the 2021 Audi A8's mild hybrid system work?

I've heard that the 2021 Audi A8 has a mild hybrid system. Can you explain how it works and what benefits it provides?

The 2021 Audi A8's mild hybrid system uses a 48-volt battery and an integrated starter generator to assist the engine during acceleration and improve fuel efficiency. This allows the engine to shut off while coasting or at a stop, reducing emissions and saving fuel.

The mild hybrid system in the 2021 Audi A8 also allows for smoother start-stop operation and regenerative braking, which captures energy that would normally be lost during braking and stores it in the battery for later use.