You will be in charge of your own harbor and compete with other players around the world. Your task will be to unload ships, store the resources and sell them at the best time for max profit.
Ships will arrive every few minutes and need to get unloaded. Every ship carries resources that you can store in your warehouse. The market prices change daily so you have to pick the right time to sell. Don't wait too long, if your storage is full, you can't unload any more ships.