Navigational interactivity is the most basic form of interactivity. This level of interaction focuses on fundamental task of navigating through the information space, either via commands, menus, search engines, or hypertext links. The search engine and the hypertext link are the most sophisticated forms of navigational interactivity. However, even it its most sophisticated form it still limits the user's control to only what they get to access next.
Still, navigational interactivity is the most fundamental, and good navigational layout is fundamental to the success of a site. The WEB has always, as a result of its underlying hypertext paradigm and the development of search engines and directories, offered excellent navigational interactivity. This navigational superiority over other Internet information systems, such as Gopher and WAIS, has been a key factor in the WEB's ever-increasing popularity.