Point Spread
Margin of victory, or expected final score differential, between two teams. If the spread is 3 points, you'll see that as both -3 and +3. The team with a spread of -3 is more likely to win; the underdog is less likely to win at +3.
If you expect a team to win by 3 points or more, you’d take that team -3. If you expect a team to lose by less than 3 points OR win, you’d take that team +3. When you see a half a point in the spread, the team you pick must win by the next highest whole number.