Yes, hypnosis can really be used to help people stop smoking.
But you need to be realistic about it. It won’t be as easy as taking a “stop smoking pill” (if there were such a pill…).
Some people believe that if they get the help of a hypnotist to stop smoking, all they need to do is show up in that person’s office, pay a fee, lay down on a couch, get hypnotized and afterwards they never feel like smoking again. While there are (very) rare occurences of this actually happening, you definitely should not count on it. Even with hypnosis, there often is a tiny bit of a struggle involved – but hypnosis gives you the tools to be stronger than the craving without a nerve-shattering combat against a monstrous desire. Instead, you’ll remain calm and cheerful.