What was the "Great Migration" and when did it take place?

Happened around 1916 to 1970 and it was when like 6 million African Americans moved from the south to the north and the west

The Great Migration, sometimes known as the Great Northward Migration, or the Black Migration, was the movement of six million African Americans out of the rural Southern United States to the urban Northeast, Midwest, and West that occurred between 1916 and 1970.