NFL is the National Football League, the highest level of professional American football. It consists of 32 teams split evenly between the American Football Conference and National Football Conference. Each conference has 4 divisions of 4 teams. The regular season runs from September to January, followed by a single-elimination playoff culminating in the Super Bowl in February between the AFC and NFC champions. The Super Bowl has been the final NFL game since 1966 and is typically held on the second Sunday in February. NFL odds represent the spread, which is the point difference the favorite must win by, and the odds, which indicate how much must be bet to win $100 for favorites or how much can be won on a $100 bet for underdogs.