What are the key benefits of the Audi A8's e-tron hybrid technology?

I am considering purchasing an Audi A8 and have heard about their e-tron hybrid technology. Can you tell me more about how it works and what are the main advantages over traditional gasoline engines?

The e-tron hybrid technology in the Audi A8 combines a powerful electric motor with a fuel-efficient gasoline engine, providing a boost in performance and improved fuel economy. This means you get the best of both worlds - the power and performance of a traditional engine, with the added efficiency of an electric motor.