The game asks your preference to make it all the more interactive and engaging. You move ahead to earn in-game currency and devise strategies to stay ahead of your competitors in the game. There can be many endings based on the choices you make.
You play as a character of the ancient continent of Calradia and fight your way to become either a king, or a leader, or a bandit or whatever you, wish to achieve. Mount and Blade Warband is an open universe game with no specific end.