Football odds are a key part of the betting world, and understanding how they work can help you increase your winnings. The odds are a reflection of the probability of each team winning a match and are usually updated during the build-up to a game.

The odds can change due to physical events in the game, like a red flag, player change, injury, penalty, goal or other event that may impact the match’s outcome. They can also move during the course of a game, for example if a flurry of bets are placed on one team.

There are many different types of betting on NFL games, including point spreads, moneylines, totals, parlays and teasers. Bettors can also place prop bets or future bets on certain teams to win a particular game or championship.

Straight bets are the most common type of football bet. They are typically based on a team’s odds and a dollar amount. The money that you bet will be multiplied by the odds to determine your winnings if the bet is successful.

Over/Under bets are another popular option and are based on the combined total number of points scored by the teams in a game. The number can be calculated by adding the home team’s score and the away team’s score.

If a number of bettors back Over, the line will go up, while those backing Under will see it go down. This is especially true in the build-up to a game, which can cause the over/under lines to move significantly. bookmakers