Ginseng is a root from plants in the Panax family. It's been used a lot in TMC, and it is one of the better known medicinal substances. Below, is a picture from Britannica article, where you can find a more detailed information about this root.
Ginseng, in the form of a powder is a part of Ginseng Oolong that we use for our Ginseng Oolong Kombucha.
Here's some more info from Wikipedia:
"One of the first written texts covering the use of ginseng as a medicinal herb was the Shen-Nung Pharmacopoeia, written in China in 196 AD. In his Compendium of Materia Medica herbal of 1596, Li Shizhen described ginseng as a "superior tonic". However, the herb was not used as a "cure-all" medicine, but more specifically as a tonic for patients with chronic illnesses and those who were convalescing."
And Panax, in Greek means "all healing"
There's a lot more information available about Ginseng. Here's a compilation from Dr. Axe.
Disclaimer: All medical information in this post is merely information & not advise. If you need medical advice, please consult your doctor or other appropriate medical professional.