How does the Audi A1's e-tron technology work?

Can someone explain the workings of the e-tron technology in the Audi A1? Is it similar to other electric cars, and how does it affect the overall performance of the car?

The e-tron technology in the Audi A1 combines a traditional combustion engine with an electric motor, creating a hybrid car that can switch seamlessly between power sources. As a result, the car is able to achieve better fuel efficiency and reduced emissions while maintaining the same level of performance as a regular car.