What is Audi pre sense plus in the Audi A3?

I've heard about Audi's pre sense plus feature, but I'm not sure what it does or how it works. Can someone explain it to me in more detail?

Audi pre sense plus is an advanced safety system that uses sensors and cameras to detect potential collisions and take preemptive measures to prevent them. It can automatically apply the brakes and tighten the seatbelts if it senses an imminent collision. My friend has it on his A3 and says it gives him peace of mind while driving.

Audi pre sense plus is like having a virtual co-pilot in your car. It constantly monitors the road and traffic around you, and can warn you if it detects any potential hazards. I have it on my A3 and it has saved me from a few close calls already. Definitely worth considering as an option.

Simply put, Audi pre sense plus is a high-tech safety feature that uses a combination of radar and cameras to provide a 360-degree view of your surroundings. It can even detect pedestrians and bicycles and help prevent accidents before they happen. My dad has it on his A3 and swears by it.