Cannabis genus is a plant that can be used in many forms such as topically on the skin, orally through an edible or beverage, and smoked. THC, CBD, and CBG can be extracted from the plant itself for those things. CBD can also be extracted through hemp. You will also find skincare products that are simply hemp based.
Imagine using an flower that slows down the production of sebum to your skin. If your body produces too much sebum; this causes you to have acne and oily skin. Sebum is a yellowish, oily substance secreted by the aptly named sebaceous glands that are found on nearly every surface of the body. There are other factors such as dirt, sweat, and dead skin cells that attribute to sebum. Overactive hormones and certain diseases also produce more sebum in the skin. Cannabis infused products help reduce sebum when applied topically. It benefits people whose skin is prone to eczema, psoriasis, acne, and textured (hairy, etc).
Ensembles with other oils that complement it create a beneficial skincare system that works for any skin type. You may even consider other herbs such as turmeric, rosemary, or cloves to bring in other healing benefits.
There are lots of options out there for you to pursue if you decided using cannabis in your skincare routine was for you. It can can be made into oils, creams, soaps, balms, cleansers as well. Pretty much whatever you can think of can be made into a cannabis skincare product. It pairs well with scents and can also be done unscented depending on what the user liked. You wouldn't have to worry about smelling like cannabis smoke or flower.
Cannabis can not get into the bloodstream with topicals unless it penetrates the epidermis. This would allow it to get into the bloodstream thus giving you the "effects" of cannabis. This doesn't always have to be psychedelic; using CBD or CBG won't give you the same effects as THC. There are products that show specific mg and strains that will do certain things for your mood and body depending on what you choose. So things like creams, certain oils, and sprays won't penetrate well enough to get any body high effects. They will however cure skin ailments like the ones I mentioned above.
It's like a super ingredient that keeps your skin & mind evolving gracefully.