It is the grand path or the grand yoga system that begins after the kundalini energy is awakened, which is called Sidha Mahā Yoga.
All the yoga systems, tantric practices, religious practices, philosophies, doctrines, dogmas, etc., which exist in the world today, are there to basically wake up the dormant cosmic energy (KUNDALINI ENERGY) located inside the human body in the first chakra. This can be done directly or indirectly using a wide variety of techniques which somehow activate its reverse mode of destruction or involution!