How does Audi A8's Mild Hybrid System work?

I've heard that the Audi A8 has a Mild Hybrid System, but I don't fully understand the technology behind it. Can someone explain it in simple terms?

The Audi A8's Mild Hybrid System works by pairing a 48-volt electrical system with a lithium-ion battery and a belt alternator starter. This allows the car to coast with the engine shut off, leading to improved fuel efficiency and reduced emissions.

Think of it as a stop-start system on steroids. The Mild Hybrid System allows the car to restart quickly and smoothly, without the typical jerk or delay associated with traditional start-stop systems. Plus, the added power from the battery provides a boost during acceleration.