What is the concept of doubling in backgammon and how does it impact the strategy of the game?

In backgammon, the concept of doubling allows a player to offer their opponent to double the stakes of the game. If the opponent accepts, the game is worth double the original value. This impacts the strategy as players must decide when to double based on their position in the game and the likelihood of winning. It adds a layer of complexity and risk to the game, as accepting a double can lead to a higher reward or a greater loss.