The hemp plant has molecules that give it it’s smell and taste, but that isn’t all that they do.  They carry with them health beneficial qualities as well.  Hemp is not the only plant that has them.  Other living this like trees have them as well.  Think of it this way, plants like chamomile and lavender have a distinct smell and taste but also have the ability to have a calming effect on the body.  So, the same can be said about the hemp plant.  The hemp plant has a variety of different terpenes that have different health benefits and aid the CBD in doing its work. You can find naturally available terpenes in Full and Broad-Spectrum CBD oil.  As well, you can get Isolate based CBD oil that has the terpenes added back to it.  With these types of oils, you will see names like Pineapple Express and Super Lemon Haze.  TO created these oils, the hemp strain of each type (Pineapple Express, Super Lemon Haze, etc.) has had a laboratory evaluation of what terpenes are in them and the terpene combination has been formulated and added to the mixture.