The handle is a term specific to sports betting, which is the amount of money wagered by players. It’s the amount that has been put into play at land-based and online sportsbooks. A bookmaker’s handle is different from its revenue.
A sportsbook’s revenue is calculated after all bets are settled and the winners collect profits. The handle can also be used as the percentage of wagers on one side of the betting line. In this context, the handle is all the money bet on the game while calculating what percentage was wagered on each team.