What is relocation in real estate sales?

Relocation usually refers to a department or a company which handles buyers who are being moved from one state/locale to another some distance away. Usually these "relocation" sales involve sellers and buyers who work for large companies. The company hires the relo company to facilitate their employees' move by selecting a realtor in their current town to list their home and a realtor in the destination city to help them find a new residence.