What is the purpose of the hybrid technology in Audi A4?

I've heard that the Audi A4 has a hybrid component, but I'm not sure what it does or why it's necessary. Can someone explain?

The purpose of the hybrid technology in the Audi A4 is to improve fuel efficiency and reduce emissions. The hybrid system works by supplementing the gasoline engine with an electric motor, allowing the car to use less fuel while driving. It also captures energy from braking and deceleration, storing it in the battery for later use, further reducing fuel consumption.