How should primary, secondary, and tertiary navigation be arranged?

• A. Primary is for minor sections; secondary for main topics; tertiary for rarely used items.
• B. Tertiary should be the main navigation.
• C. Secondary navigation should be hidden.
• D. Primary navigation is the main sections; secondary supports subtopics; tertiary for less frequently used items; order by frequency and importance.

Answer: (D)

In navigation design, use three levels to mirror how users explore content: primary defines the main sections, secondary provides access to subtopics within those sections, and tertiary covers items used less often or for utility actions. The primary navigation should present the major areas of the site or app that you want users to reach from anywhere. It acts as the backbone of the information architecture and should be concise, stable, and easy to scan.

Secondary navigation appears after a user selects a main section, offering subtopics that live under that section. It helps users drill down without jumping to unrelated areas, keeping the context clear while allowing deeper exploration.

Tertiary navigation is for less frequently used items or auxiliary actions—things like help, settings, terms, or login. It stays available but stays unobtrusive so it doesn’t clutter the main paths.

Arrange items by how often people need to use them and how important they are to common tasks. Put the most-used, essential sections in the primary bar, place the common subtopics in the secondary menus, and keep the rarely used or utility links in the tertiary area. This approach minimizes cognitive load and speeds up navigation.

Other options misplace the emphasis: making tertiary the main navigation hides key areas, or hiding secondary navigation makes deeper exploration hard, and labeling primary for minor sections misleads users about where to find the main content.