The United Nations (UN) is a vital international organization that aims to maintain global peace and security, promote human rights, and foster international cooperation. Established in 1945 after World War II, the UN has 193 member countries and is headquartered in New York City. The UN engages member states in discussions on pressing global issues through various meetings and conferences, plays a crucial role in peacekeeping missions by dispatching forces to maintain stability, and provides humanitarian relief during disasters and conflicts. Furthermore, the UN supports treaties and agreements that focus on protecting human rights and the environment. Despite its achievements in promoting peace and development, the UN faces challenges such as limited funding, difficulties in enforcing decisions, and the potential misuse of veto power within the Security Council. Thus, while the UN significantly impacts global stability, continuous reform and cooperation among member states are necessary for its effectiveness.