UPSC aspirants should be aware of several important international organizations that play significant roles in global governance. Key organizations include the United Nations, which addresses issues related to peace, security, and development; the World Bank, focused on economic development and poverty alleviation; and the International Monetary Fund (IMF), which provides monetary cooperation. Understanding the World Health Organization (WHO) is also vital for public health policies. Awareness of regional organizations like the Saarc and Asean is critical for comprehending regional cooperation and diplomacy.