Freight is the transport of commercial goods by ship, aircraft, train, van or truck. When importing, freight is an important part of the total cost that determines how much profit you will make. Frieght, particularly from China to the US, or from China to Australia and New Zealand, can dramatically increase the overall cost of sourcing products internationally. For this reason, it is important that you shop around for freight quotes from multiple shipping companies.
You should also invest in freight insurance for every shipment. It's not uncommon for shipping containers to fall off a vessell during the crossing!