BRICS is an international organization formed by Brazil, Russia, India, China, and South Africa to promote economic development, remove trade barriers, and establish a development bank to challenge Western financial institutions. The BRICS nations represent a significant portion of the world's population and GDP and aim to use their collective economic strength to enhance global trade and investment, focusing on infrastructure and resource management. Key initiatives include lending in local currencies and supporting smaller developing economies, while facing challenges like geopolitical disputes and competition with established institutions like the IMF and World Bank.