Three basic questions a reader can ask:
Where am I?
Where can I go?
Where have I been?
Provide clues and feedback to answer these
The jumping through and across texts can lead to a disorientated feeling in the reader, who may not have a strong awareness of where they are or what they can visit, or even what's already been viewed.
The author can provide many clues here, such as location indicators and site maps, differentiation between visited and unvisited links, and some indication of the depth of material behind the link. Navigation in hypertext is one of the hardest aspects for an author to get right, but is often crucial to a full understanding in their readers.