Moneyline odds show the confidence, or lack thereof, that bookmakers have in a team to win and it also plays a factor in determining the spread on a game. Also, the moneyline odds on an event tell sports bettors what the implied probability is for that team to win. The payout of a moneyline bet depends on the odds you get on a team to win. The other team will have positive odds to win, and they are the underdog.
One team will have negative odds, and that team is the favorite to win.
In the simplest terms, a moneyline bet is a wager on which team will win an event.