What is the e-tron regenerative braking feature and how does it work?

I've heard that the Audi e-tron has a regenerative braking feature. How does it work and what are the benefits of using it?

The regenerative braking feature uses the e-tron's electric motors to slow down the vehicle, converting kinetic energy into electrical energy that is then stored in the battery. This helps to improve the overall efficiency of the vehicle and can also extend its range.