A Moneyline bet is a wager on which team will win the game, including overtime if it's played. The minus odds indicate the favourite, and the plus odds indicate the underdog.
For example: Toronto Raptors are the favourite at -130, and Boston Celtics are the underdog at +100. A $100 bet on the Raptors returns $176.92 total if they win; a $100 bet on the Celtics returns $200 total.