This is another bet usually strictly for soccer and not used in American Football.
When you bet the money line on any soccer game, there can be three outcomes, also known as 1 x 2. The home team (1) can win, the away team (2) can win, or the match can end in a draw (x).
In regular season contests, such as the English Premier League, all matches are determined in the standard 90 minutes of play, plus any time added on for injuries and substitutions.
If you think the home team will win the match outright, then you would bet on (1). If you think the away team will win the game, then you would bet on 2. If you think the game will end in a draw (the two teams will have the same score when the final whistle is blown.) then you would bet the x for that outcome.
An example from he 2018-19 English Premier League season of the 1×2 betting would have be the match between Everton at home (1) at odds of +140, the draw (x) at odds of +225, and Chelsea away (2) at odds of -105. Everton won the match 2-0, so if you bet on the 1 for $100, you would have won your $100 back plus $140, for a return of $240.