Human migration (derived from Latin: migratio) is physical movement by humans from one area to another, sometimes over long distances or in large groups. The term migrant was usually understood to cover all cases where the decision to migrate was taken freely by the individual concerned for reasons of "personal convenience" and without intervention of an external compelling factor; it therefore applied to persons, and family members, moving to another country or region to better their material or social conditions and improve the prospect for themselves or their family. The net number of migrants, that is, the number of immigrants minus the number of emigrants. It is expressed as thousands.

Interesting facts:

1. According to the International Organization for Migration's World Migration Report 2010, the number of international migrants was estimated at 214 million in 2010. If this number continues to grow at the same pace as during the last 20 years, it could reach 405 million by 2050.
2. Different types of migration include:
   • Seasonal human migration mainly related to agriculture and tourism to urban places
   • Rural to urban, more common in developing countries as industrialization takes effect (urbanization)
   • Urban to rural, more common in developed countries due to a higher cost of urban living (suburbanization)
   • International migration