Tree testing is a user research method used to evaluate the usability of a website or app’s navigation structure. In a tree testing exercise, participants are presented with a simplified version of the site’s navigation structure, called a “tree,” and are asked to find specific items or pages within the tree. The tree typically does not include any actual content, only the labels or titles of the navigation items. The goal of tree testing is to identify any issues or confusion with the navigation structure, such as poorly labeled menu items or confusing hierarchy. Tree testing can be a valuable tool for designers, as it can help identify potential usability issues early in the design process and can inform the development of a more user-friendly navigation structure. Tree testing can be conducted using specialized software or online tools, and can be done with individual users or with groups.