Yin Yoga is a powerful contemplative practice. The power is in its subtleness. The stillness of the poses allows the mind to also relax, giving the practitioner a meditative experience as well. It literally touches and transforms both your body and your mind.
The main areas of focus are the spine, pelvis and lower limbs. The practice is recommended for students of all levels.
Give yourself an experience that will help you to feel at greater ease in your body, and to lift some fog from the mind. Trying a Yin class yourself is the only way to understand this.