A mudra is a symbolic or ritual gesture or pose. While some mudras involve the entire body, most are performed with the hands and fingers.
Mudras have meaning in many forms of Indian dance, and yoga.
In hatha yoga, mudras are used in conjunction with pranayama (yogic breathing exercises), generally while in a seated posture, to stimulate different parts of the body involved with breathing and to affect the flow of prana, Bindu or consciousness in the body. Examples of this diversity of mudras are Mula Bandha, Mahamudra, Viparita Karani, Khecarī mudrā, and Vajroli mudra.
The Hatha Yoga Pradipika states the importance of mudras in yoga practice.
We focus on the practice of mudras because, by practising it, a connection is developed with the patterns in the brain that influence the unconscious reflexes in the different areas. The internal energy is, in turn, balanced and redirected, creating an impact on the sensory organs, tendons, and glands veins.