Bluffing is an important poker strategy that allows a player to win pots without the best hand. There are two types of bluffs: pure bluffs where a player bets with the weakest hand, and semi-bluffs where a player bets on a draw. Successful bluffing requires understanding opponent tendencies and choosing moments where the bluff will be profitable over the long run, even if called occasionally. Semi-bluffing on draws is effective if the draw has around a 35% chance of succeeding.