Betting the point spread is one of the most popular sports betting methods, along with money line bets, and over/under (total) bets.To cover the spread, a bettor must either bet on the favorite or the underdog, and to win their wager, the team must cover the point spread - or, win by more than the point spread.In sports betting, sportsbooks calculate a point spread between two teams, providing a determination of which is the favorite and which is the underdog.