Full explanation — Bluff
A bluff is a bet or raise made with a hand that is unlikely to win a showdown, aiming to convince the opponent to fold a better hand. An effective bluff needs a consistent story built across the streets, a board texture that supports the story, and an opponent whose range is realistically capable of folding. Bluffing too often or in the wrong spots turns you into an easy target, so strong players calibrate bluff frequency carefully rather than bluffing on instinct alone.