Cannabis strains refer to the different varieties of the Cannabis plant, each with unique characteristics, effects, and flavors. They are typically categorized into three main types: Indica, Sativa, and Hybrid. Indica strains are known for their relaxing effects, making them popular for nighttime use, while Sativa strains tend to be more energizing and uplifting, suitable for daytime activities. Hybrid strains combine traits from both, offering a balance of effects. Each strain contains varying levels of cannabinoids and terpenes, which contribute to their distinct effects and aromas. Cannabinoids, like THC and CBD, interact with the body's endocannabinoid system, influencing mood and perception. Terpenes are aromatic compounds that provide flavor and may also affect the strain's effects. Understanding these differences helps users select the right strain for their needs.