Sportsbooks offer many types of wagers, including money lines, spreads and totals. A bettors can also combine multiple outcomes into a single bet called a parlay. All of these wagers are priced at odds that change throughout the course of a game and are subject to different rules.

In addition to determining the winner of a particular bet, a sportsbook’s rules determine whether a bet is official or not. Some states require that all bets use official data, which can be obtained from a league or other source. This information helps prevent fraud and protect the integrity of the sport, and some states have banned betting on certain games or events if there is evidence of insider information.

Nevada legalized sports betting in 2019 and offers a variety of retail and online options, with the Las Vegas Strip offering dozens of locations from DraftKings to Caesars. Those who want to bet on sports online can download a sportsbook app and place a bet from anywhere in the state.

Illinois passed sports betting legislation in 2019 and launched its retail and online sportsbooks in March of 2020. Initially, the state required in-person registration for online sports betting, but that requirement ended on March 5, 2022. Now, bettors can register on a sportsbook app from anywhere in the state and place bets with DraftKings, BetMGM, PointsBet and FanDuel.

Colorado also passed sports betting legislation in 2019, with its retail and online sportsbooks launching on May 1, 2020. New Hampshire passed legal sports betting in December 2019 and has partnered with DraftKings for online sportsbook operations. Connecticut passed legal sports betting in October 2021 and has a number of online sportsbook options to choose from, including DraftKings, FanDuel and BetRivers.