Citronella is a type of grass known for its strong lemon-like scent. It is commonly used to produce essential oil, which is extracted from the leaves and stems. This oil is popular in various products, including candles, sprays, and lotions, primarily for its natural insect-repelling properties. The primary use of citronella oil is to deter mosquitoes and other pests, making it a favored choice for outdoor activities. Additionally, it has applications in aromatherapy and can be found in some cleaning products due to its pleasant fragrance.