What Is Aromatherapy? Aromatherapy is the practice of using essential oils, plant oils or fragrances for therapeutic and spiritual benefit. Aromatherapy has been used for centuries. When inhaled, the scent molecules travel from the olfactory nerves directly to the brain and especially impact the amygdala, the emotional center of the brain. Aromatherapy provides relief to our mind, body & soul through plant oils, essential oils or incense.