Brochure mockups are a type of design created to showcase the look and feel of a finished product. In this case, it is a brochure. They are often used to show clients what their final design will look like before they have it printed or published.
A brochure mockup is also called a “mock-up” or “mock-up template.” It is usually created by designers who want to show their clients what the final product will look like in advance.
The brochure mockups are often used when the designer is too busy to create the final design or when they want the client to be involved in the process from start to finish.
Check out this Free Square Trifold Brochure Mockup, it comes in photorealistic resolution, well layered PSD file, and can be easily swapped out with your custom design using smart object.