Proof of Performance (PoP)

(1) Acronym for proof of play or proof of performance. A reporting mechanism in which logs are used to show that an ad actually played back on a digital signage system; some advertisers now also demand “proof of display,” verification that the ad was actually shown on the screens, as well as third-party audited play logs
(2) Acronym for point of purchase. Retail marketing term for a display or any advertising that targets customers near the cash register or the counter where items are bought; also known as point of sale (PoS), but PoS often refers to the equipment used to facilitate the retail transaction.