What is the significance of the "double" in backgammon and how does it impact gameplay?

In backgammon, a "double" is when a player rolls the same number on both dice. This allows the player to double the stakes of the game. The significance of the double in backgammon is that it adds an element of strategy and risk to the game. Players must decide whether to accept the double and continue playing at higher stakes, or decline and concede the game. This can impact gameplay by creating tension and forcing players to make strategic decisions based on the current state of the game.