A sportsbook is a gambling establishment that accepts wagers on various sports. It also has the ability to offer a number of other games and events, including horse racing and live poker.

Legality: The legality of online sports betting varies from state to state, and it’s important to check your local laws. Additionally, you should ensure that the sportsbook you choose is licensed in your jurisdiction and operates within your borders.

Cash flow: The money your sportsbook makes in sales must be sufficient to cover the cost of running the business, such as rent, utilities, payroll, and software. You should also be aware of a bookie’s vig, or markup on winning wagers.

The vig is an important factor to consider when starting a sportsbook, as it will help you turn a profit and protect your business from losses. It’s usually a percentage of the total bet, but it can vary depending on the sport and type of betting.

Payment: A sportsbook should allow you to deposit and withdraw funds easily. Some will require a paper check, while others accept credit cards or cryptocurrency. In addition, some sportsbooks allow you to leave your winnings on your account and use them for future bets.

Customer Service: A good sportsbook should have a customer support team that is available around the clock to answer your questions. If you need help, you can contact them via email or phone.

A good sportsbook should also offer mobile betting. This is important for a number of reasons, and it’s a good sign that the site is responsive to the needs of their customers.