What is a "bluff" in poker, and how can it be used effectively?

In poker, a "bluff" is a strategy where a player bets or raises with a weak hand, hoping to deceive their opponents into thinking they have a strong hand and causing them to fold. Bluffing is a common tactic used in poker, and can be very effective when used correctly. To successfully execute a bluff, the player must carefully read their opponents' behavior and betting patterns, and make a bet or raise that is large enough to convince their opponents tha....