Point-of-purchase signs—POP signs for short—are signs placed near the checkout lanes or cash registers of retail stores. They serve two purposes. First, they indicate where people can checkout the products they intend to buy. The checkout is a pretty important place in any retail environment; after all, it’s where customers give you their money, which is pretty much the whole point of running a business. That’s why you want that area to be as identifiable and recognizable as possible.