Essential oils are concentrated plant extracts that are used in aromatherapy and other holistic healing practices. They are made by distilling or pressing different parts of plants, including flowers, leaves, and roots. Essential oils are believed to have therapeutic properties and can be used for a variety of purposes, including stress relief, pain relief, mood enhancement, and respiratory health. Some common essential oils include lavender, peppermint, tea tree, and eucalyptus. Essential oils can be inhaled, applied topically, or ingested in some cases. It's important to note that essential oils should always be used with caution and under the guidance of a qualified practitioner, as they can be potent and potentially harmful if used improperly.