How does the 'auto hold' function work in the Audi A4?

I am interested in using the 'auto hold' function in my Audi A4 but I am not sure how it functions. Can someone explain it to me?

The 'auto hold' function in the Audi A4 allows the driver to stop the vehicle without having to continuously press down on the brake pedal. It keeps the vehicle stationary until the accelerator is pressed. My advice is to use it in stop-and-go traffic to alleviate foot fatigue.

The 'auto hold' function in the Audi A4 automatically engages the parking brake whenever the vehicle comes to a complete stop. It is especially useful when you are parked on a hill or in a busy city. When disengaging the function, make sure to apply the brake pedal first to prevent sudden movement.