The Economic and Social Council has 54 members and coordinates the UN's economic, social and environmental work
Background
The Economic and Social Council is one of the six principal organs of the United Nations, all of them established under the UN Charter when the Organization was founded in 1945. It is described by the United Nations as the principal body for coordination, policy review, policy dialogue and recommendations on economic, social and environmental issues, as well as for the implementation of internationally agreed development goals. It serves as the central mechanism for activities of the UN system and its specialized agencies in the economic, social and environmental fields, and it supervises subsidiary and expert bodies. It has 54 Members, elected by the General Assembly for overlapping three-year terms, so that only part of the membership changes in any one year. The United Nations calls it the Organization's central platform for reflection, debate and innovative thinking on sustainable development.
In plain words
ECOSOC Economic and Social Council — The UN organ that coordinates the economic, social and environmental work of the UN system.
Principal organ Principal organ of the United Nations — One of the six bodies set up by the UN Charter itself, as distinct from programmes and agencies created later.
Specialized agency UN specialized agency — An autonomous international organisation linked to the UN by agreement, such as the ILO or the FAO.