W1 and W2 betting in football refer to half-time and full-time betting on a football match. W1 is the symbol showing the result of the first half. W2 is the symbol that shows the result of the whole match.  For instance, assume that you placed a W1/W2 bet. In other words, you are predicting that team one will win the first half while team two will win the match. Alternatively, you may choose to make a W1/X bet. This wager would imply that team one will win the first half, but the overall match will end in a draw.