The first Bantu-speaking people lived in what is now Nigeria and Cameroon. Bantu-speaking people began migrating south and east out of this area. What was the effect of this migration?

The effect of this migration was that the Bantu language was spread throughout Africa. When the Bantu-speaking people moved through this continent, obviously they brought their language along with them. And as they settled all over Africa, they spread their language to the people living there, and thus some of them adopted this language as their own and started speaking it. This led to the Bantu language being spoken all over Africa.