emigrate, immigrate, and migrate

There's always a little confusion around these three words. The choice of which one to use is determined by the point of the view of the sentence.

Emigrate means to leave.

• She emigrated from France to live in the United States.

Immigrate is come in.

• She immigrated to the US from France.

Migrate is to move.

• During the period of industrialization, much of the rural population migrated to urban cities.