The game is won by the player who first manages to take all his opponent's pieces or renders them unable to move.
A draw occurs by agreement at any point during the game. If a player refuses the offer of a draw, that player is required to force a win or show a decided advantage within 40 of that players own moves from that point. Draws are fairly common in the game of draughts - especially at the top level of the game.
I hope that was helpful =]