# What Is a Sportsbook?

A sportsbook is a place where you can make a bet on various sporting events. They charge vig for their services and accept wagers on different kinds of sports. Some sportsbooks also offer mobile apps for their customers. These websites can be found in many cities across the United States. In addition to their desktop website, they offer many different betting options.

## Sportbooks accept bets on teams to win by a certain number of points

If you have a favorite team in a football game, you can place a bet on that team to win by a specified number of points. This option is called a moneyline bet. In most sports, this type of bet is not available. When placing your bet on a team to win by a certain number of points, you should note that the spread does not include half points.

Sportsbooks have trouble determining a favorite when the teams are evenly matched. If there is no clear favorite, they will not release a spread. The spread may be a small number of points or it can be very tight, with the odds for each team almost identical. Sometimes, the spread is void. In such a case, you should consider placing a moneyline bet instead of a spread bet.

## They charge a vig for their services

A vig is the price for providing sportsbook services. It is the cost of doing business, and assures the bookie that some portion of every bet goes to their bottom line. Without this fee, sportsbooks would go out of business. Sports bettors should shop around for sportsbooks that have the lowest vig.

A vig can be calculated using a simple math formula. For instance, if the odds are Texans (+350) and the Chiefs (-460), the vig is equal to the difference between the two probabilities. If you’re betting on a team with a positive point spread, the vig looks to be zero, but it’s actually doubling or more your winning wager.

## They offer mobile apps

While traditional online sportsbooks offer desktop and laptop versions, mobile sportsbooks allow you to place bets anytime, anywhere. These apps are especially useful if you want to bet on a game while watching it live. You can also use them while you’re in a bar or at home.