The World Trade Organization (WTO) was established in 1995 and replaced the General Agreement on Tariffs and Trade (GATT). The WTO has 153 member countries and governs over 95% of global trade. It aims to liberalize trade, set trade rules, facilitate dispute resolution, and cooperate with other economic institutions to promote international trade. The WTO is overseen by a ministerial conference that meets every two years and a director-general. Its headquarters are located in Geneva, Switzerland.