In manufacturing and design, a mock-up, or mock-up, is a scale or full-size model of a design or device, used for teaching, demonstration, design evaluation, promotion and other purposes. A mock-up can be a prototype if it provides at least part of the functionality of a system and allows testing of a design.

A mockup can give a visual representation of a product or service being used, persuading consumers to complete the purchase. Let customers see what they are about to buy and they are more apt to complete the transaction.