This refers to the physical appearance of the resource, its logic and navigability. A good resource should have a very logical arrangement of information. It should be easy to see what information is available, and links should be arranged to facilitate sensible navigation through a given topic.
Navigability is one of the most important features of any Internet resource.
A good resource should encourage seamless movement between sections of data. It should always be simple to return to previous locations and to the top level of a resource. Links within a resource should always be clearly labelled to ensure that the user is aware of moving from one location to another. Links should also always state clearly where they are pointing. A good resource will always provide navigational links between locations and back to the top level.