Show card is a term used to describe a printed piece of card that contains information about a product or service. There are several synonyms for this term, including display card, point-of-sale card, and promotional card. These types of cards are often used in retail environments to draw attention to a particular product or sale. They can be placed on shelves or hung from displays, and are intended to catch the eye of shoppers and encourage them to make a purchase. Show cards can be designed to be simple and eye-catching, or they can be more detailed and informative, depending on the needs of the business.