What is the function of the Start Stop System in an Audi A2?

I've noticed this system in my new Audi A2 and am wondering how it works and how to properly use it. Can someone explain its purpose and operation?

The Start Stop System in an Audi A2 is designed to save fuel and reduce emissions by automatically turning off the engine when the car comes to a complete stop. It can also improve the overall efficiency of your vehicle by preventing unnecessary idling. To use it, simply apply the brake and the system will activate. When you release the brake, the engine will start again. It's a great feature for city driving and can help reduce your carbon footprint!

I've found that the Start Stop System in my Audi A2 can also be helpful in reducing noise pollution. When the engine shuts off at a stop, it creates a quieter driving experience. However, if you prefer to have the engine on at all times, you can turn off the system with the press of a button. It's all about personal preference and finding what works best for you.