ECOWAS has worked for West African integration since 1975 from its headquarters in Abuja
Background
The Economic Community of West African States states that since 1975 it has worked for the integration, peace and shared prosperity of West Africa. Its headquarters is on Airport Road in Abuja, Nigeria. Ghana is one of its member states and has its own country page on the organisation's site. The community rests on a founding Treaty, later revised. Its remit runs from trade and free movement to peace and security operations in the region. Membership of ECOWAS is one of the two regional layers in which Ghanaian trade policy sits, alongside the continental free trade arrangement.
In plain words
ECOWAS Economic Community of West African States — The regional body for West Africa, covering trade, free movement and regional security.