A freight forwarder coordinates with multiple carrier methods including air, rail or highway to ship goods from one destination to another. Freight forwarders manage the relationships and important tasks in the shipping process: from negotiating freight changes to preparing shipping documents, but do not actually move the freight itself. They act as a liaison between carriers and companies looking to ship their products. 3PLs handle the entire supply chain, including picking and packing, warehouse storage, as well as shipping.