Aid is used for sending goods to other empires. Each market allows you to send 50 goods each month. Once the goods are dispached it will take 6 of your months before they will reach their destination, and you cannot cancel the aid. 5% of the goods will be taken by the merchants as a fee for their fatigue. You can only dispatch one aid transport per 4 hours to the same person. After you send aid to someone, the next aid you can send will be 1 hour after the first aid.
Aid cannot be sent between shared ip address accounts.