The most common situation with suited connectors, aside from flopping absolutely nothing, will be flopping some sort of small piece like a pair or a gutshot. After that comes the chances of flopping some sort of stronger draw like an open-ended straight draw or a flush draw. Significantly behind that are the chances of flopping a big hand such as two-pair or better.

Another consideration is that you will occasionally have reverse implied odds with this hand, when you make the bottom end of a straight or a weak flush draw. It's hard to fold that kind of hand, but sometimes you'll have to do it if you want to be able to play these hands profitably. But for the most part, when you make your hand with a suited connector, you will be good to go, and often have a fairly disguised hand.

Because of the above considerations, suited connectors are fairly constrained by the immediate odds you are getting before the flop. For example, you are almost never going to be able to stand a 3-bet with this kind of hand unless the effective stacks are fairly deep, and you think you will have a decent edge on your opponent. Suited connectors also play much better in position than out of position, so while it makes sense to open-raise them from late position, you will likely want to muck them from early position. And even though they can be raised first into the pot, you'll usually want to flat-call or over-limp if there is action in front of you.

When To Raise: LP

When To Call: MP

When To Fold: EP, against all re-raises