You know the phrase " AA wins small pots but loses big ones "? Well suited connectors is the hand that cracks those big pairs most of the time. Its a hand that allways has a goal of stacking your opponent. So when you enter the pot you have your eyes on your opponents stack.
When should you play them ?
On micros you should always play them in position. On a tight passive table you can open from MP cause you know your opponent is going to call with overcards overpairs-
hands that you can stack if you both connect. But before you enter the pot take a look at your opponent stack. If its under 50bb you shouldnt call cause your not getting enough implied odds to call even if you stack him.
If a tight player opens from UTG i might consider a call IP if there are no aggresive squeezers behind me.
In multiway pots when you are getting immediate odds as well as implied odds you should call.
The goal is to enter the pot cheaply and becouse there are easy to play post flop you can manage your actions from that point on.