It is true that it's hard to tell online because you can't actually see the person, but let's say I have a middle pocket pair. And I raise pre-flop. The flop comes. If I am
bluffing, I am going to bet big, because I don't want the the next guy to be on a draw and suck me out later on. If I have something good. Let's say I hit trips, I'll probably bet twice or three times the BB assuming that I will have the best hand (not always) and hoping that the other guy will call. If some bets the min bet, I will usually re-raise them, if they call they have something. Many people
bluff with the exponential bet. Let's say they raise pre-flop, bet the flop, then double that bet on the turn, and double their turn bet on the river. If you don't have anything you are probably folding by the flop or the turn, and they have a good bluff, if you have something I'd suggest a large re-raise and see where they stand. Also just to mix things up in a game, I'd suggest once in a while raising preflop with
hands you wouldn't normally raise with. It will keep the people at your table guessing