Yin and yang are terms used in Chinese philosophy to explain how what look like opposing forces actually complement each other. It can be the same with the physical practices of yoga.
The best type of yoga for you is going to be what your body is asking for at the time. Are looking for an energy boost and get the blood flowing or are you feeling tired and looking for a restorative practice.
Keep reading for what could be called the yin and yang of yoga.