this is the definition I was given:
Emotional Freedom Technique is a psychotherapeutic alternative medicine tool based on a theory that negative emotions are caused by disturbances in the body's energy field and that tapping on the meridians while thinking of a negative emotion alters the body's energy field, restoring it to "balance."
Basically, it is about resolving underlying emotional issues to help people deal with the symptoms - and is used to combat a whole host of things like eating disorders, fears/phobias and anxiety. A friend received this treatment via a therapist to help her over bereavement when her dad died and she was fairly positive about it.
The manual I received came from this site:
I trust myself. I have started so I will finish. I am succeeding.