The National Football League (NFL) is a professional American football league consisting of 32 teams, divided equally between the National Football Conference (NFC) and the American Football Conference (AFC). The NFL is one of the four major professional sports leagues in North America and the highest professional level of American football in the world. The NFL is the most popular and lucrative sports league in the United States, and it is also the most attended domestic sports league in the world. The NFL is renowned for its intense rivalries, hard-hitting play, and exciting game-day atmospheres, and its championship game, the Super Bowl, is one of the most watched sporting events in the world. The NFL is comprised of 32 franchises, which are located in cities throughout the United States, with teams in all four major U.S. television markets. The teams play a 16-game regular season schedule, and the best teams from each conference advance to the playoffs. The playoffs culminate in the Super Bowl, which is held at a neutral site and is one of the most anticipated events of the year. The NFL is presided over by the Commissioner of the NFL, who is responsible for enforcing the league's rules and regulations, as well as overseeing the day-to-day operations of the league. The NFL also operates a variety of other initiatives, such as youth football programs, charitable giving, and research and development. The NFL is a powerful force in the sports world, and it continues to be the most popular sports league in the United States.