Terpenes are a fragrant oil that give cannabis an aromatic flare, and are found in cannabis as well as, fruits, herbs, and other plants as well. They give strains like Sour Diesel is fuel smell, Lemon Twizzler its lemon aroma, and Sage N’ Sour its earthy sage flavor. These oils are secreted in the buds sticky resin glands that contain the cannabinoids we are all familiar with.