People buy products at the checkout counter impulsively. They quickly look at the item, make a yes/no decision, and follow through with the transaction
Don’t overcomplicate things by displaying an entire product line of items. Customers don’t want to make multiple decisions when they’re standing in line getting ready to pay. If they have to decide between colors, flavors, and sizes, it’s no longer an impulse buy, but rather a carefully thought out purchase. As you make your display, choose one item you want to focus on and avoid adding any other products to the area.
Choose products that can be used by every single customer who walks up to your register. Think of what you normally see in the checkout line at grocery stores: batteries, chapstick, candy, and magazines. Every customer could use these items, which is why they sell so well when featured by the register. Before you create a display, make sure you ask yourself, “could this benefit each of my customers?” If not, choose another item.