What this isn’t

Human grounding, as the term initialised here, is not “earthing”.

Grounding, also known as earthing, is when you stand on the earth or have contact with a product that’s grounded into the earth. This is thought to connect your body to the natural electric charge of the earth and transfer electrons into your body. 

https://www.webmd.com/balance/grounding-benefits

So for the sake of clarity, “grounding” as a word by itself and “human earthing” as a phrase both refer to the practice of making direct skin contact with the Earth.