Bet 12 is one of the double-outcome bets. In such a bet, the player will receive a win if the match ends with the victory of one of the teams: either Team 1 or Team 2 (i.e., there will be no draw).
The 12Bet 35 free bet offer is easy enough to claim. Just open an account using your PC or mobile and place six bets on the sportsbook to receive a free bet token worth up to 35.