To activate and use them premium features in stronghold kingdoms, you need to use a premium token. There are 3 different types of tokens, a 2 day, a 7 day and a 30 day token. Once you activate a token the entire premium features unlock and you can use the features such as moving buildings and queuing research as well as setting what offline features you want when you’re not on such as auto scouting and auto trading.
2 Day Token
You can get a 2 day token from completing the tutorial at the start of the game as well as completing some quests. You cannot buy these.
7 Day Token
These tokens can be bought for 30 Firefly Crowns
30 Day Token
These tokens can be bought for 100 Firefly Crowns