Original: Aromatherapy is a form of alternative medicine that uses volatile plant materials, known as essential oils, and other aromatic compounds for the purpose of altering a person's mind, mood, cognitive function or health.
Simplified: Aromatherapy is a type of alternative medicine that uses the part of plants known as essential oils. Some people think that aromatherapy helps to change a person's mind, mood or health but this has n't been proven scientifically.