A mockup is a static visual representation of a product or screen that shows how the interface is expected to look without necessarily simulating its interactions.
A mockup can show the intended visual hierarchy, component choices, content, brand styling, and responsive composition for a screen.
It is useful when the team needs to evaluate presentation rather than interaction.
A wireframe focuses on structure. A mockup adds visual detail.
A prototype emphasizes how the experience behaves. A mockup is usually static.
A set of mockups can later become a prototype.
A static image cannot fully test an interaction sequence.
Visual quality can create false confidence in a weak product concept.
One beautiful default screen is not the complete interface.
A mockup asks: if this screen existed, how should the visual interface look?
Wireframe · Prototype · UI design · High-fidelity prototype
Read Prototyping UX Design for the relationship between static and interactive artifacts.