Money line just refers to you betting on a team to win straight up. The moneyline itself (the number) tells you what odds you are getting.
Example: Blackhawks -150 means that you are betting on the Blackhawks to win straight up, and that you would have to risk $150 to win $100. Positive numbers are the opposite: +120 means that if you risked $100, you would win $120.
Example: Blackhawks -150 means that you are betting on the Blackhawks to win straight up, and that you would have to risk $150 to win $100. Positive numbers are the opposite: +120 means that if you risked $100, you would win $120.