TAG stands for tight aggressive and describes a style of play where a few carefully selected hands are played aggressively. In general and particularly at the lower limits, the TAG style is quite profitable.
Just like with LAG's, it must be noted whether a player's style is consistent throughout betting rounds, or whether he plays the opening round aggressively and then sinks into passivity. Hence, we also speak of Tight-Aggressive-Aggressive (TAA) and Tight-Aggressive-Passive (TAP) players.
LAG, Tight, Loose, Aggressive, Passive