The user needs to locate content and features necessary to accomplish a task.
There are too many items to fit into a limited space without overwhelming the user.
The user needs the ability to look up information alphabetically within a large data set.
User needs to navigate potentially large quantities of information efficiently, without becoming lost.
Called 'nav bar' for short, this is any component in a page design that provides persistent navigation assistance.
The user needs to view a subset of data that will not be easy to display within a single page.
The user needs to navigate - possibly through one or more stacked panes - to reach content and features in a context offering a clear indication of their current location.