This chart shows the effects of different Cannabinoids. This is random, but if you get your Cannabis tested and it says like 25%, that does not mean your buds are 25%, it means that the extract/absolute was 25% of that.
CBD has become pretty well known across America due to things like the Charlotte's Web law (Where some states allow the production of the Charlotte's Web strain of Marijuana, which is high in CBD) and people who were cured before and because of that law. CBD is an Opiod and only has slight basically unnoticeable effects on the Cannabinoid receptor. It works as a pain killer and is used to treat things that require Cannabis but in cases when there is a child or someone who does not want to get high. It can make up up to 40% of the extract. CBD is very closely related to THC and all it takes is a strong acid to change the structure from CBD to THC.
THCv is much well less known, but I think THCv is the next CBD. What I mean by that is, first everyone knew about THC, then came CBD which was like a "Whole new application for the plant" and then next will be THCv which is "More whole new applications for the plant" because it can be used for Weightloss and Diabetes treatment. THCv is in Sativa strains, and is in highest quantities in strains from Milawi in Africa. Common strains with high THCv are Durban Poison & Silver Haze #9. UV light also seems to bring out the THCv, so adding a UV or UVB light to a grow could add THCv to a Sativa grow.
THCv is the next CBD, everyone should try to get strains from Milawi, that is something that is going to end up really being useful.
Here is some stuff about it
There are also Cannabinoids that can be made in a lab using THC as a base, there is THCV or THC5 which is something like 100x as potent as THC.