A key part of creating a successful design is the creation of a mockup. By creating a mockup, you are able to visualize the design in a way that is tangible and helps you identify potential issues before the design goes live. This step allows you to perfect the design, ensuring that it meets all of the necessary criteria while also exceeding the expectations of your clients or customers. A mockup also enables you to collaborate with others more effectively-- you can share the design with colleagues, clients, or stakeholders to gather feedback that will be useful in refining the final version of the design. Ultimately, by investing time and effort in creating a thorough mockup, you can ensure that the final product is both aesthetically pleasing and functional, meeting all of your objectives.