Polo is a team sport played on horseback in which the purpose is to score goals against an opposing team. Players score by pouring a small white plastic or wooden ball into the opposing team's goal using a long-handled mallet.

The conventional sport of polo is played at speed on a large grass field up to 300 yards in length, and every polo team consists of four riders and their mounts. A modern variant is called arena polo which is played indoors or more generally outdoors on an enclosed all-weather surface (the field of play is much smaller, rarely exceeding 100 yards in length). In arena polo there are only three players on every one team and a small inflatable leather ball is used instead.

Arena polo matches usually consist of four 7 minute periods (called chukkas or chukkers), as opposed to field polo matches which consist of between four and eight 7 minute chukkas (depending on the level being played).

A form of arena polo seen almost completely in the western United States is polo. Polo was called 'PULU' or 'sagol Kangje' by Manipur is in India and the history of the game in India stretches back to 3000 BC. Later Mughal-era manuscript shows the popularity of the game among emperors and their courtiers.