If you were to bet on Liverpool at -1 on the single Asian handicap market against Aston Villa, they would need to win by two or more goals for your bet to be successful.
Should they win by a one-goal margin, the result with the handicap applied would be a draw. Due to this, the bet would be a push and your stake would be returned.
In another example, if you had bet on a basketball game to have over or under 180 total points within the game, and there were exactly 180 points scored at full time, then the bet would be classed as a push, and your stake returned.
If the game ended in a draw or a win for Villa, your bet would lose.