What does 0.5 goals mean in betting?

When betting on 0.5 goals you have the option of backing under or over. Below both concepts are explained:

When you back 0.5 goals you are predicting that the game will have 1 goal or more scored. If any goal is scored you will have won the bet.

With this selection you would only lose if the match ended a draw and was 0-0

Backing Under 0.5 Goals

When you back under 0.5 goals you are predicting that the match will have no goals. This bet is identical to backing correct score 0-0, as the only way this bet is won is if no goals are scored.

The same rules apply for all other similar goal markets, including over and under 1.5, 2.5, 3.5 and 4.5. In some matches higher options are available and can go up to 8.5 goals.