The goal of a sportsbook is to balance bettors on both sides of the bet. As a result, sportsbooks will set the odds for an event based on the expected probability of that outcome. Using exact probabilities will yield a 50% win rate on point-spread bets and a 4.5% profit margin on moneylines. The vig is used to compensate the bookmaker for the lowered odds.

A good sportsbook will offer customer service chat to address customer questions or concerns. This ensures that new customers are happy with the experience and continue using the product. However, make sure to use a sportsbook that offers the best customer service. They do not want to lose money and will work hard to make you happy. The most reliable sportsbooks offer live chat support. It is also worth mentioning that FanDuel has more states than any other online sportsbook.

It’s also important to know how to make money with a sportsbook. The vast majority of sportsbook bonuses are “free play” ones, meaning that the bettors get a certain percentage of the money they deposit as free play. However, these free play bets will have a rollover rate. These rules are not always obvious, so check them out to see how they work. They’ll give you a sense of the kind of experience you’re likely to have with an online sportsbook.