What does the umpire do in a cricket match?

In cricket, an umpire (from the Old French nompere meaning not a peer, i.e. not a member of one of the teams, impartial) is a person who has the authority to make judgements on the cricket field, according to the laws of cricket. Besides making decisions about legality of delivery, appeals for wickets and general conduct of the game in a legal manner, the umpire also keeps a record of the deliveries and announces the completion of an over.

A cricket umpire is not to be confused with the referee who usually presides only over international matches and makes no decisions affecting the outcome of the game.