The Order Board (helicopter pad) is a special building available from the very start of the game. Here you can collect your resident's orders and fill them by sending off a helicopter loaded with goods. It takes some time for the order to be delivered after you've tapped Send.

 

The coins and experience points that you get for filling orders help you level up your city. Keep an eye on the number of coins and experience points that you get for filling each order to better plan your gaming strategy. You can dump the orders you don't like by tapping the trash icon. It takes time for a new order to appear, but you can speed it up by using Megabucks.

 

Sometimes you will get special orders and you will get Megabucks for completing them.