Yogurt choices confuse me

Okay I admit it. It don't take much to confuse me. But buying yogurt lately just overwhelms me. What happened to it being a simple dairy product with some fruit and sugar added. Now some yogurts are fat-free while others have low calories or no added sugar. Other yogurts have added vitamins, omega-3s, probiotics and god knows what. What does it all mean and how does a crazy hockey mom choose?