A sportsbook is a venue, either online or in-person, that accepts bets on sporting events. It’s also known as a bookmaker, or a “bookie.” Sportsbooks make their money by charging a commission on losing bettors’ wagers—this is often called the vig, or “juice,” and it allows the sportsbook to pay out winning bettors.

Before 1992, when the Professional and Amateur Sports Protection Act (PASPA) was passed, betting on sports was illegal in most states. However, a black market developed where people used unlicensed operators, or “bookies,” to take bets. These operators collected a small percentage of all bets placed, which gave them an edge over the sportsbooks that complied with PASPA regulations.

Today, there are over 40 legal sportsbooks in the United States and a growing number of regulated offshore ones. These establishments offer a variety of sports betting options, including moneyline bets, spread bets, and prop bets. Many also offer odds on other types of gambling, such as political events and esports.

Whether you’re writing for a traditional sportsbook or an online one, it’s essential that you have a thorough understanding of the sport you’re covering. This will allow you to write informed, well-written articles. It will also help you recognize potentially mispriced lines.

Researching the sport’s rules, history, and culture will also improve your writing. Familiarity with key players, team histories, and ongoing narratives (like a player’s comeback or championship chase) will add depth to your articles. Moreover, the passion you have for your subject will shine through in your writing.