The induction is the procedure that assists people go into a state of hypnosis, where they will be more vulnerable to recommendation, and where their unconscious mind will take messages onboard. Individuals choose to enter into this state because they want to attain a certain change or improvement in a specific part of their lives, generally.
How a hypnotist carries out an induction can vary greatly. Various techniques work well for different people. There can be hundreds and even countless induction scripts or methods.
In restorative hypnosis, understood as hypnotherapy, we generally use a method we call progressive relaxation. This implies helping the person to become gradually more and more relaxed till they ultimately fall into the state of hypnosis.
Learn how Hypnosis works: Define Hypnosis