InformationBodyQ&A has one level of categories available and all of them are visible to all Question teams.Custom workflows use categories to route questions to workgroup.To differentiate a category you could extend a topic with additional detail e.g. HR - London, HR - Paris, etc. For more information, please see:Q&A Setup TitleCan I create sub-categories in Q&A?URL NameCan-I-create-sub-categories-in-Q-A
SummaryThe article explains that Q&A supports one level of categories, visible to all Question teams, and suggests extending a topic with additional details, such as HR - London or HR - Paris, to differentiate categories.more info