What Is a Sportsbook?

A sportsbook is a gambling venue where people bet on sporting events. Until recently, sportsbooks were only legal in Nevada, but they have since expanded to more than 20 states and are now available online.

A sportbook’s main objective is to attract action on both sides of a game, and they do this by offering odds that are fair and accurate. The odds indicate the probability of a particular outcome occurring and allow bettors to place wagers on their preferred teams or players.

The bookmakers who run these sportsbooks make money by collecting a commission on losing bets, known as the vigorish. The standard vig is usually 10%, but it can be higher or lower depending on the sport in question and the amount of money being wagered.

Another important aspect of a sportsbook is its house rules, which vary from one betting shop to the next. If you’re a new bettor, it’s important to read the rules thoroughly before placing your bets.

It’s also a good idea to find out which sports are available and the types of bets customers can place on them. Some online sportsbooks offer multiple bet types for a variety of sports and leagues, while others focus on just one. Be sure to choose an online sportsbook that offers the bets you want and has a user-friendly interface. You’ll also want to be able to deposit and withdraw funds safely and securely. The best sportsbooks also have customer support and live chat options.