Helpers: Simply put, helpers help players! They take requests, questions, handle situations, host fun games/shows and can help manage businesses.
Moderators: Mods do all of the above as well as take donation store payments, help set up regions and fully manage server businesses or disciplines.
Head Moderators: HeadMods can do all of the above, however they mainly help manage the staff team, handle more complicated situations and help run server events.
Administrators: Administrators manage the staff team and the server, they make sure everything is running smoothly. They can often host large server events.
Developer: Developers manage the servers control panel. They add/fix/update plugins to keep the server running smoothly and the players happy.
Owner/Co-Owner: The owner owns the server & the Co-Owner manages the server.