In Sanskrit, 'yoga' means 'union' and 'nidra' means 'sleep'. Yoga nidra is the conscious relaxation of the mind to enable the subconscious to be accessed while in a complete state of rest. This may seem a little complicated, and truth be told, it is. You have to be fully awake in your mind while your body is fully relaxed to such an extent that you drift between consciousness and unconsciousness.
One of the biggest benefits of "Yoga Nidra" is the power it gives you over your own mind. It is possible to influence your mind along a certain path using "Yoga Nidra". By planting a seed into the subconscious and focusing on that thought while in yoga nidra, it is possible to change your entire personality along a certain line. This is extremely beneficial for people who are looking to change their ways of thinking, looking at new approaches, or simply looking to achieve certain goals.