The Group of Twenty, or G20, is an international forum consisting of 19 countries and the European Union. The G20 was established in 1999 with the aim of facilitating international economic cooperation and decision-making. The member countries of the G20 account for around 80% of global GDP, making it a powerful platform for economic diplomacy and policy coordination.

The G20 meets annually, with member countries taking turns to host the summit. The meetings provide an opportunity for world leaders to discuss a range of economic and financial issues, including trade, investment, fiscal policy, and financial regulation. The G20 is not a formal institution, but rather an informal forum, and as such, decisions made by the group are not legally binding.

Since its establishment, the G20 has played an important role in shaping global economic policy. During the 2008 financial crisis, the G20 helped to coordinate a global response, which included measures such as fiscal stimulus and coordinated interest rate cuts. More recently, the G20 has focused on issues such as climate change, digitalization, and global health.

Critics of the G20 argue that the forum lacks transparency and accountability, and that its decisions often reflect the interests of the most powerful countries. They also argue that the G20's informal structure means that its decisions are not subject to democratic