Why does the Audi A8 have a mild hybrid system?

I have been interested in the Audi A8 and noticed that it has a mild hybrid system. What is the purpose and benefit of this system?

The Audi A8's mild hybrid system is designed to improve fuel efficiency and reduce emissions. By utilizing a 48-volt battery and an integrated starter generator, the vehicle can perform certain tasks, such as start-stop functionality, purely on electricity rather than using fuel. This reduces the load on the engine and leads to better fuel economy.

In addition to improving efficiency, the mild hybrid system also provides a smoother and more seamless driving experience. With the integrated starter generator, the A8 can quickly and smoothly restart the engine when needed, without any hesitation or jolts. This leads to a more enjoyable and comfortable ride.

Another benefit of the mild hybrid system in the Audi A8 is its ability to provide additional torque and power. The integrated starter generator can assist the engine during acceleration, giving the vehicle a boost in performance. This is especially useful when passing or merging onto highways.