Interface Design commonly refers to the Graphical User Interface (GUI). The GUI is the interaction of metaphors, images, and concepts used to convey function and meaning on a computer screen. Interface also includes to graphic design and interface architecture, a combination of aesthetics and technical organization. Every GUI should include a header, footer, local navigation, and content elements, all organized in a useful, informative manner. A header typically contains a the site's identity, major navigation links, and possibly a search box. Content navigation may be organized at the top of the page or on the right or left sides in columns, organized and labeled so that a user may locate and understand their path as a function of their query.

Two major aspects to interface design are navigation and wayfinding; for the internet, this includes the elements of a website used to locate and guide users through complex, online spaces. Wayfinding has four main components which include orientation, route decisions, mental mapping, and closure. While travelers need paths, edges, districts, nodes, and landmarks to aid in navigating from place to place, internet users need paths, regions, nodes, and landmarks to wayfind within a site. These paths must be consistent and well-marked, the regions need unique identification for each group, nodes should be simple choices to change paths, and landmarks should be consistent graphics and titles to keep users oriented and moving successfully.

Interface design is important because it gives users a clear path for navigation through the use of consistent and well-marked design elements including titles, logos, menus, icons, and content. By offering understandable navigation, a user is able to practice wayfinding confidently; users may identify and search for what they need or want without wasting time and without getting lost. Well-constructed navigation allows for efficient and successful wayfinding.