Hypnosis is a therapeutic technique that involves guiding an individual into a deeply relaxed state of focused attention and heightened suggestibility. 

While in this state, the person becomes more open to suggestions and can access parts of their subconscious mind, making it easier to address various psychological or behavioral issues. 

Hypnosis can be used for a range of purposes, including stress reduction, pain management, overcoming phobias, quitting smoking, enhancing performance, and treating anxiety or depression.