-Some African communities living along the coast were converted to islam.
-It led to development of towns to along Kenyan coast e.g. Mombasa Malindi and Lamu.
-Arab Muslim culture spread along Kenyan coast.
-Arab immigrants intermarried with indigenous inhabitants giving rise to Swahili communities.
- Arab trader introduced new crop along the coast.
-The coming of Arabs stimulated growth of trade-between costal town and outside world.
-Slave trade brought about war among communities.
-Slave trade and slavery led to depopulation of regions