The 4 bet movement is a movement that is used a lot in cash especially, but in important MTTs it is also used frequently.
Of course, this move is usually made with premium hands, but in online cash, understanding that you know your opponents, it's even a move that from a certain position can be done with JJ for example, or KQs, etc.
In general, unless his stack is short, a player after a 3 bet does not go all-in, he usually 4 bets.
In general, the 4 bet is a strategy that gives me information about the opponent.
In general, most of us never open in position, nor bet in position with the corresponding cards, which of course the professionals or serious regulars do.
But at the microlimit levels that we play, it is very normal for a player to open A2s from UTG, or they 3 bet you from MP with 44 and even 4 bet you from BB with A10, or I will only cite examples.
Assuming that your game is a serious game, adapted to the positions in which you play solidly, the 4 bet for me is a very good move with hands such as JJ, QQ, up to and including 1010.
In general I speak of NL cash. This situation in MTT changes according to your stack. If your stack is wide a 4 bet is not a bad move, if your stack is short then shoving is usually the normal move after a 3 bet.
Well that at least is my thought brother.
Greetings


