When you assign a reviewer to a category, they will be able to assess the surveys that belong to that category. This is particularly useful for academic conferences - you can assess submitted papers. Using categories, you can make sure that submissions are reviewed by experts in the field.

The interface of this tab, for each added category, includes only the editable Category name field and a set of icons that let you provide translations, drag and drop to change the order, and remove redundant categories.