There is no such thing as a half point in sports, but there is in sports betting!  The half point ensures that a side will win and that the match will not end in a push, where the spread equals the actual difference in points between the two teams.  In a push all bettors get their money back, which is no good for the oddsmaker!  Half points also give oddsmakers more control over lines, allowing them to set more specific values.
Understanding how a moneyline wager pays isn’t simple but it’s not very complicated. That said, it might take running through a few examples before fully grasping the payouts. Moneylines for football and basketball games are often tied to the point spread. When a game has a large point spread it usually has a large moneyline. Both are separate bets but are shown together in a sports wagering app screen and in a brick and mortar sportsbook.

That was all before Charles McNeil, a math teacher from Chicago, invented the concept of the point spread. An avid gambler, McNeil created what he called “wholesaling odds” and started his own bookmaking operation in the 1940s. He started out offering this new style of betting on football, but his business model grew to include basketball.  McNeil changed the way sports betting was done, and his legacy lives on today in what we now call the point spread.