Pozidrive is a type of screwhead like Phillips head. Its shape is similar to a Phillips head, but it has indentations at the inside corners of the “cross” (the black silhouette of the screwhead on the OP packaging shows this better than I can explain it). Pozidrive screwdrivers have lobes that slot into these indentations. IIRC, pozidrive is supposed to have less chance of camming out of the screw and stripping the head than Phillips.

Pozi compatible recess means that you’ll be able to use a pozidrive screwdriver with these screws.