FIFA (Fédération Internationale de Football Association, known throughout the world by its French-language acronym, FIFA) is the international governing body for association football. It is headquartered in Zurich and has 208 member associations. Its goal, according to the official website, is the constant improvement of football. 
Specifically, FIFA governs worldwide football tournaments, the most notable of which is the World Cup.
The current president of FIFA is Joseph S. ("Sepp") Blatter.