How do you activate the launch control in an Audi A7?

I just bought an Audi A7 and I heard that it has a launch control feature. How do I activate this function and what are the benefits of using it?

To activate launch control in an Audi A7, follow these steps: 1) Put your car into Sport mode. 2) Press and hold the brake pedal. 3) Press the gas pedal all the way down until the engine reaches approximately 3,500-4,000 RPM. 4) Release the brake pedal. Launch control will then be engaged and your A7 will accelerate smoothly and quickly.