What does +400 mean in betting?

In sports betting, a "+400" odds typically indicates the amount of profit a bettor would make if they wagered $100 on an underdog and that bet was successful.

For example, if you bet $100 on a team with +400 odds and they win, you would receive $400 in profit, in addition to getting your original $100 bet back. So, your total payout would be $500 ($400 profit + $100 original bet).

These odds represent a situation where the team or player is considered less likely to win, hence the higher potential payout compared to betting on a favorite, where the odds are typically lower.