Why does the Audi A5 have a start-stop system?

I've noticed that my new Audi A5 has a start-stop system that shuts off the engine when I come to a stop. What is the purpose of this feature and how does it benefit me as a driver?

The start-stop system is designed to improve fuel efficiency by reducing the amount of time the engine idles. This can save you money on gas in the long run.

Additionally, the start-stop system helps to reduce emissions by minimizing the amount of CO2 released into the atmosphere. This is good for the environment and helps to reduce your carbon footprint.

However, if you find the start-stop system to be too annoying, you can deactivate it by pressing the button on the center console. Just keep in mind that this may slightly decrease your fuel efficiency.