Freeloading/upselling displays

Small display solutions that are strategically placed on store fixtures are often referred to as 'freebie displays'. Their job is to drive additional sales to the products already on the shelves. Their prominence has a number of advantages:

This makes the products extra visible to customers
With their immediate locations, they can inspire small impulse purchases and stimulate additional sales.
They are perfect for complementary items such as dips at the chip shelves.