What is the anti-rattle clip on an Audi 80 and how does it work?

I'm trying to fix a clunking noise in the front brakes of my Audi 80 and I've been advised to check the anti-rattle clip. Can someone explain what this clip is and how it helps with the noise issue?

The anti-rattle clip is a small metal clip that is attached to the brake caliper and holds the brake pads in place. When the brakes are applied, the pads can vibrate and cause a clunking noise. The anti-rattle clip helps to dampen this vibration and reduce the noise.