What is the biggest forum of world?

The World Economic Forum (WEF) is the largest international organization for public-private cooperation. The WEF engages the foremost political, business and other leaders of society to shape global, regional and industry agendas. It was established in 1971 as a not-for-profit foundation and is headquartered in Geneva, Switzerland. The WEF holds an annual meeting in Davos, Switzerland, bringing together top leaders from business, government, international organizations, civil society, academia and the arts to address the most pressing global challenges.