The main world contains factions,an economy and it allows you to lock your chests. There is an Admin Shop that encourages players to trade among themselves.
Aside from this world there is a creative world, where you can built whatever you want and a pure survival world. In the creative worlds you'll work with plots as a way to prevent grieving and have a clear border. In the survival world everyone is equal and ranks do not exist. All the worlds are accessible from the start and do not require anything but joining the server.