What is a 3-Bet?
Pre-flop
1 Bet = Big Blind
2 Bet = Raise
3 Bet = Re-Raise (Second raise, going over the top of the first raiser)
4 Bet = Re-raise of a Re-raise (3-Bet)
Cold 4 Bet = When the 4-Bet comes for a player entering the pot normally a nutted hand
On Flop we have the following
1 Bet = Raise
2 Bet = Re-Raise (Second raise, going over the top of the first raiser)
3 Bet= Re-raise of a Re-reraise
<6% only re-raising premium holdings
8%-9% Some bluff in there 1 in 4 times a medium hand
>10% Lot of bluff
>13% Hard to be +EV