A window display is usually made up of items carried in a store, and they’re displayed at the front of the store, in the window, so they can be viewed by passers-by on the street. It sends a little me...A window display is usually made up of items carried in a store, and they’re displayed at the front of the store, in the window, so they can be viewed by passers-by on the street. It sends a little message to the shopper, saying, “New Product!” or “Sale!” In the case of this shelf talker below, the retailer is leveraging a “complementary grouping” approach by reminding people to get their flu shots where they sell their pain relievers.