Spread betting is a popular form of sports betting, as it provides more betting options than simply betting on the winner or loser of a game. In NBA betting, a +7 spread means that one team is considered the underdog and is given a 7-point head start or handicap. This means that if you bet on the underdog, they must either win the game outright or lose by less than 7 points for your bet to win. At the same time, the favourite team would have a -7 spread, which means they are predicted to win by more than 7 points. Therefore, if you bet on the favourite, they would need to win by more than 7 points for you to win the bet.