It is a family of team sports that involve, to varying degrees, kicking a ball with the foot to score a goal. Unqualified, the word is understood to refer to whichever form of it is the most popular in the regional context in which the word appears. Sports commonly called 'football' in certain places include: association football (known as soccer in some countries); gridiron football(specifically American football or Canadian); Australian rules; rugby football (either rugby league or rugby union); and Gaelic. These different variations of football are known as codes.
The various codes of it share certain common elements: Players in American, Canadian, rugby union and rugby league take up positions in a limited area of the field. At the start of the game. They tend to use throwing and running as the main ways of moving the ball, and only kick on certain limited occasions. Body tackling is a major skill, and games typically involve short passages of play of 5–90 seconds. The League was founded in England, becoming the first of many professional competitions. During the twentieth century. Several of the various kinds of it grew to become some of the most popular team sports in the world.