Hypnosis is a natural state where your conscious attention is focused within your mind. The phenomena of hypnosis is real. It feels very pleasant, often euphoric.
Hypnosis is as old as humans.
Positive suggestion is used in hypnosis to convince the subconscious level of mind to act upon the desires of the conscious level of mind. However, the subconscious can and will block any suggestions, even in hypnosis, that its programming or inner personalities within the subconscious levels resist. Hypnotherapy addresses these blocks and resistance so they can be changed. The body can feel unusually heavy, unusually light, even as though it isn't there. In general, you hear everything the hypnotist is saying.