This template can be used to add a navigation bar to "assessment by topic" category pages that follow the naming convention "Category: importance-importance topic pages" (e.g. Category:Top-importance history pages) in order to facilitate navigation between the various assessment class categories for that topic. By default, the template will also add the category to the parent categories "Topic pages by importance" (e.g. History pages by importance) and "importance-importance pages" (e.g. Top-importance pages).