A tour is a path which may be replayed at will. This is useful in the creation of tutorials or demonstrations. For instance, a teacher may save a particularly interesting path taken through the hypertext, in order to play it back for students. As the network becomes larger and more complex, the value of a good tour increases. For more on this topic, see Zellweger.
Since a tour is a fixed, linear path through predefined nodes, it acts contrary to the non-linear nature of hypertext.