Hemp-derived CBD oil products will not get you "high" since they contain little or no THC, the psychoactive ingredient in cannabis. They are also now federally legal in the United States following the signing of the 2018 Farm Bill. More medical research studies are needed, but we expect that these products will continue to gain even more mainstream acceptance over time.
The CBD industry is still extremely new. The terminology hasn’t been officially sorted out yet, so each company kind of comes up with their own method of categorizing their products. As always, make sure that you do your own research before you buy anything. If you’re unsure, email the company’s customer service before you buy. Most CBD companies have good customer service teams and they’ll be happy to help.