Check the faq...
2. What is the purpose of a Kingdom and why do I want one? Kingdoms are smaller versions of the Campaign worlds – not just social lobbies. You are the Monarch of this world! You can explore, craft, build structures and even fight monsters… but a Kingdom is limited in terms of difficulty and power.
All accounts are granted a kingdom at the beginning of the game, but using it is not required (…beyond maybe a tutorial? We haven’t decided yet).
We fully expect that some players will prefer to spend the vast majority of their time participating in the Campaign Worlds, and we i