When a player rolls a double, it means the dice have the same value on both faces, like two 3s or two 5s. While a double does not have a specific impact on its own in the main bets, it can be crucial in certain side bets like Hardways, where rolling a double is required to win.
Double Example
For example, if a player places a Hard 8 bet, they need to roll two 4s (a double) to win the bet.