CBD, short for cannabidiol, is a natural compound found in the cannabis plant. It's one of over a hundred cannabinoids but unlike THC (tetrahydrocannabinol), it doesn't cause the "high" typically associated with cannabis.
True CBD oil is extracted from the hemp plant, a variety of cannabis that contains high levels of CBD and low levels of THC. It's commonly diluted with a carrier oil (like coconut or hemp seed oil) to create CBD oil, which is then consumed orally or applied topically. https://truesourcecbdoil.com/