When we refer to tells we actually mean words, emotions, acts, gestures and any other manner of behavior that a poker player does or executes while player and trying to cover the strong hand they are holding. Tells are usually done without the will of the one that acts them out, but no matter if they are consciously executed or not, the other player can interpret the meaning behind them. Many players have the same gesture or emotion whenever they try to hide their hand, but if you want to know exactly what they want to hide you have to learn to tell the exact signification of the gesture from one person to the other. When we are talking about live poker rooms, players can look strangely at you, can throw chips around, can act as if they are weak, can say things to confuse you and many other actions that can betray their hand. But all of these actions are meaningless when playing online because online you can