CBD is short for Cannabidiol. Cannabidiol is found in the hemp/marijuana plant but does not give you a high. The 'high' from marijuana comes from THC.
CBD oil is 100% LEGAL. It has been getting more and more exposure due to the health benefits that people are reporting. Due to FDA regulations, I cannot tell you that is has cured anything. I cannot tell you that it will help with a medical condition.
What I can do is urge you to google CBD oil on youtube. Listen to the stories, do a bit of research, and if you would like to see how it supports you, I'll be here!