Freight transport is the physical process of transporting commodities and merchandise goods and cargo. The term shipping originally referred to transport by sea but in American English, it has been extended to refer to transport by land or air as well.
In short, ocean freight is the method of transporting often large loads of goods by sea – putting cargo in large containers which are loaded onto vessels. Over 90% of all the world's trade is carried by sea – and even more in some countries.