You may ask yourself, why create mockups? Imagine this scenario as it has happened to many designers, including myself. You labor over a series of designs for hours on end. Tooling and whittling away the design to perfection. You send the client the design, and they don’t see your vision and in turn hate it. Now they may hate it for a number of other reasons, however odds are good they never saw your full vision. That leads me to the not so shocking conclusion that mockups are just as crucial a component as the overall design.