Kriyas are cleansing techniques in yoga that purify the body and mind, preparing practitioners for deeper spiritual practice. Originating from traditional Hatha Yoga, these practices aim to remove toxins, balance energy, and enhance mental clarity. There are several types of kriyas in yoga, each targeting different areas of the body and consciousness. These include practices like Kapalabhati (cleansing the sinuses), Trataka (eye gazing), and Nauli (abdominal massage), among others, forming a foundational part of yogic detoxification and discipline.