Wireframes and mockups are integral to the design and development process in user interface (UI) creation. Wireframes represent low-fidelity, structural layouts that are used early in the design phase, while mockups present high-fidelity visual designs, including branding and color schemes. The transition from wireframes to clickable prototypes is crucial in confirming usability and aesthetic appeal before development begins. Tools like Figma enable designers to create detailed mockups that can be converted into interactive prototypes, facilitating clearer communication with developers during hand-off. This section underscores the importance of rigorous validation of UI elements with stakeholders and users to enhance functionality and user experience.