Hierarchical organization structures arrange content in a top-down manner. It starts with overarching categories at the top, which then branch out into subcategories, providing a systematic and logical way to navigate through information or elements.

When designing hierarchies, keep in mind a few key points:

• Categories should ideally be mutually exclusive, but it’s okay to cross-list ambiguous items in multiple categories if needed. However, too many cross-listings can make the hierarchy less effective.
• Always balance breadth and depth within hierarchies. Breadth refers to the number of options at each level, while depth refers to the number of levels.
• Avoid narrow and deep hierarchies that force users to click through too many levels. Aim for a broad-and-shallow structure, which is easier for users to navigate.
• Consider users’ cognitive abilities when deciding on the breadth. The number of links you use should be easy for users to scan visually, rather than overwhelming their memory.
• Regularly user test to ensure your hierarchy is intuitive and effective.^[1]