To get the most effective results from Cannabis it is important to know several things about choosing a strain.  In addition to knowing the plant species, and what the THC and CBD content is of each strain; it is also important to know what the main Terpene profile is.  Not until recently did we, as a consumer, have the luxury of choosing specific Cannabis strains through the legitimate government sources; not to mention to be able to consider the Terpenes that are present.