PID: what is it exactly?

[ZipTie3182]

This was also a topic I was curious about Thanks for the explanations. I have another question though. I had thought last season teams used PID loops for their aiming, particularly in shooting to a certain distance? Was this not an application of PID? Now understanding what it is, I'm thinking maybe it would work if you knew you needed to wheels to spin at a specific speed to make the ball go x ft but the adjusting seems more like something you would use to keep your wheels at a constant speed.

Thanks!
Anna