Bluffers
There’s nothing worse in poker than being bluffed out of a hand which you should have won. A person who gets bluffed not only loses the pot, but with each time it happens loses also a little respect from others at the table. For this reason, a lot of poker players will start calling everything just to avoid getting bluffed. 
One of the easiest ways to catch a bluffing opponent is by looking at their betting patterns over an entire hand. If the opponent is making reasonable bets at each stage of a hand, then starts pouring money into the pot after a good card hits the board.
Who is bluffing usually displays erratic betting patterns, throwing out huge wagers when the board shows nothing.
For good reason, common poker strategy preaches to study opponents at the table. You’ll need this information to help you make any move in the game, but you’ll also need it to catch a person when they are bluffing. The more info on an opponent’s tendencies you’ve collected, the more likely you are to know when he is trying to make a bluff.
When studying this information, pay special attention to things like the aforementioned hand betting patterns, wagering patterns over a series of hands, how often the opponent stays past each street, and what kinds of cards they take to the showdown. It will take some time after entering the game to figure out everyone else’s game plan, but it is essential to do this.
