Cannabidiol (CBD) is a cannabinoid derived from the Hemp Plant. It is used for its effective and non-intoxicating pain/stress relieving and anti-inflammatory properties. Not to be confused with THC, CBD does not get you high in any way. This is because CBD does not affect the same receptors as THC. CBD is an entirely different compound from THC, and its effects on the human body are complex.
It is non-toxic, meaning it does not produce a "high" or change a person's state of mind, but it influences the body to use its own Endogenous Cannabinoids more effectively. For example, CBD stops the body from absorbing anandamide, an Endogenous Cannabinoid naturally produced in your body associated with regulating pain, happiness and more. So, increased levels of anandamide in the bloodstream may reduce the amount of pain a person feels.