Terpenes are a class of natural products consisting of compounds with the formula (C5H8)n for n ≥ 2. They are major biosynthetic building blocks and are produced predominantly by plants. Terpenes and terpenoids are the primary constituents of the essential oils of many types of plants and flowers, and they are important mediators of ecological interactions in plants. Terpenes are widely used as fragrances and flavors in consumer products such as perfumes, cosmetics, and cleaning products, as well as food and drink products. In terms of cannabis, terpenes are what make certain strains smell or taste different from others, and they can also be processed into products like cleaning solvents, pesticides, and dyes. Limonene is a common terpene that most people can recognize by its scent, and it gives the rinds of fruits such as lemons and oranges their citrusy smell. Terpenes are thought to protect plants from harsh weather and predators, and they may have therapeutic properties. For example, myrcene, found in mangoes, has antifungal and antibacterial properties and could also have sedating effects. While there is still much to learn about terpenes, they are an integral part of many alternative therapies, such as aromatherapy, and they may have potential health benefits.