In sports betting, "steam" refers to significant and rapid movement in betting lines, often triggered by a large influx of money on one side of a wager, indicating strong consensus or insider information about the likely outcome of an event. To identify steam moves, bettors can monitor line changes on sportsbooks and betting exchanges; a line that shifts dramatically in a short period, particularly within a few hours of a game, coupled with a sudden increase in betting volume on one side, signals that a steam move might be occurring.