WHAT IS A SPORTSBOOK
A Sportsbook is the same thing as a “bookmaker” or “bookie.” It's a company or individual who accepts bets from individual sports bettors.
Most of these kinds of bets are on whether a team (or individual) is going to win a specific sporting event.
Books accept bets on either side of a sporting event.
Sportsbook is the commonly used phrase for such a product within the iGaming industry.