There are three main types of sports betting: spread, moneyline, and over/under. The spread represents the difference between the final score and the total. In most cases, the favorite team is favored over the underdog, which pays out if the team beats the spread. The moneyline is the difference between the final score and the spread. Over/under is a wager on the total number of points scored by both teams. It is a more complex form of sports betting, which has numerous variations.