It is possible to provide sub-categories for each category (e.g. "Universal Analytics", "Matomo", etc. for an "Analytics" category). Each sub-category has a name and an ID. Privacy center use this name as the default label for this sub-category in case no localisation was provided in the banner editor. The ID is used in raw data exports and for technical setup of certain functionalities. It is possible to manually provide an ID. In case the field is left empty a sub-category ID will be assigned automatically.