What is Dealer’s Choice in poker?

Dealer’s Choice is a variant of poker in which the player who is on the button (or is dealing the hand) has the ability to decide the game that will be played in the coming hand or orbit. 

Example: John is on the button first, and decides that the game will be PLO (Pot Limit Omaha). An entire orbit is completed, until the button lands on the next player, Randy. Randy chooses Texas Hold’em , and a round of Hold’em is played the following orbit. The game continues with each new player having full choice from the many different variants of poker.