
Migration is the movement of people from one place to another either permanently or temporarily. The reasons why people migrate can be economic, social, political or environmental, and there are usually both push factorspush factors: Factors that encourage people to leave the place in which they live and to move elsewhere. and pull factorspull factors: Factors which attract people to move to a new place. at work.
Migration impacts both on the place left behind, and on the place where migrants settle.

Illegal immigrants on the American/Mexican border
Migration is the movement of people from one place to another.
There are many different types of migration.
Internal migration is when people migrate within the same country or region - for example, moving from London to Plymouth.
International migration is when people migrate from one country to another - for example, moving from Mexico to the USA.
There are two key migration terms that you need to learn:
Emigration is when someone leaves a country.
Immigration is when someone enters a country.