I raise preflop with JJ and make a small continuation bet on the flop, but if there is a top card on the flop like A, K, Q, and 3 Bet I will then fold the hand.
It is a good pair to play strong preflop, and to bind a set on the flop, then to move it as a half pair more, not to marry that pair. It depends also on the position and in which state of the tournament we are, playing the JJ pair at the beginning of a tournament or in the bubble is different, it is also important to know the opponent, as well as if we are playing against one or more players in the hand .