How is regenerative braking used in the Audi e-Tron?

I've heard that the Audi e-Tron has regenerative braking, but I don't understand how it works. Can you explain it to me?

Regenerative braking is a function in the Audi e-Tron that helps to convert kinetic energy into electrical energy, which is then stored in the battery. This process helps to increase the vehicle's overall efficiency and can even extend its driving range. Something to keep in mind is that you should use the manual braking system when needed, as regenerative braking works best in stop-and-go traffic.