What is the purpose of the Audi A7's 48-volt mild hybrid system?

I've heard that the Audi A7 has a 48-volt mild hybrid system, but I'm not sure what it's used for. Can someone explain its purpose and how it works?

The 48-volt mild hybrid system in the Audi A7 is primarily used to improve fuel efficiency and reduce emissions. It works by storing energy from regenerative braking and using it to power the car's electrical systems, reducing the load on the engine and improving overall efficiency.

In addition to its fuel-saving benefits, the 48-volt mild hybrid system also provides a smoother and more responsive driving experience. The electric motor provides added torque when accelerating, resulting in a more powerful and effortless ride.

One of my favorite features of the Audi A7's 48-volt mild hybrid system is its ability to coast with the engine off at speeds between 34-99 mph. This further reduces fuel consumption and increases efficiency without sacrificing performance.