To pan is to move from side to side, holding a fixed vertical level. In photography, the concept is similar, except, this time, we try to match the speed of the subject, and the speed of panning, while controlling the shutter speed.
The idea is to shoot slow enough to capture motion, while moving in the direction of the subject, at the speed at which the subject crosses the frame, so that the relative speed between the camera and the subject is zero. The outcome, in a proof of concept mode, is the photo below.
With practice, one can nail tack sharp panned photos and let me tell you this, they look amazing.
Go out, give panning a try. It is worth learning how.
Last time, P was for Post Processing.