The G20 Nations, or Group of Twenty, is an international forum that brings together the world's major economies. It includes 19 individual countries and the European Union, representing about 80% of global GDP and two-thirds of the world's population. The member countries are Argentina, Australia, Brazil, Canada, China, France, Germany, India, Indonesia, Italy, Japan, Mexico, Russia, Saudi Arabia, South Africa, South Korea, Turkey, the United Kingdom, and the United States. The G20 was established in 1999 to promote international financial stability and address global economic challenges. It holds annual summits where leaders discuss various issues, including trade, climate change, and sustainable development. The G20 plays a crucial role in shaping global economic policies and fostering cooperation among its members.