Step-by-step explanation:
The Portuguese were initially exploring the coast of Western Africa in the 15th century in search of a sea route to the East Indies, as the traditional land route through the Middle East was controlled by Muslim powers who charged high fees for access to their ports. The Portuguese wanted to bypass these powers and establish their own trade network, and they believed that if they could find a sea route to the East, they could trade directly with the source of valuable spices and other goods.
In the process of exploring the West African coast, the Portuguese also sought to establish trading relationships with the local peoples, often trading for gold, ivory, and slaves. They also built trading posts and forts along the coast to protect their interests and to serve as bases for their ships. Over time, these trading posts became more permanent settlements, and the Portuguese began to establish a colonial presence in the region, which eventually led to the establishment of the Portuguese empire in Africa.