Essential oils are concentrated liquids extracted from plants, capturing their natural fragrance and beneficial properties. These oils are often used in aromatherapy, where they can promote relaxation, improve mood, and even support physical health. Common essential oils include lavender, peppermint, and tea tree, each offering unique benefits. People use essential oils in various ways, such as in diffusers, massage oils, or bath products. They can also be added to household cleaners for a pleasant scent and natural antibacterial properties. However, it's important to use them safely, as some oils can cause skin irritation or allergic reactions if not diluted properly.