I heard that there is a substance called CBD in marijuana. What is the effect of CBD?

There are many kinds of cannabis, which can be divided into recreational cannabis and industrial cannabis according to their uses and THC values. Contains industrial hemp, such as people's livelihood, medical care, cosmetics, textiles and so on. CBD is a component extracted from the stems and leaves of industrial hemp, also known as cannabidiol. CBD has many functions, such as treating insomnia and depression; Cannabis * * and China's skin care products containing CBD also have moisturizing and anti-inflammatory effects.