Some of us call it a "ground rod"
I was a 4th year apprentice, about as cocky as they get, I expect, and my father-in-law, a coal miner retired on black lung, asked if I wanted to go fishing "Sure, says I". I'll go get us some night crawlers. Don't make any holes in my yard, he says.
Proceeds to get an old cut off ground rod, hooks up a hot wire to it, about 5 feet from the main service, and UP come the worms.
I figured A) He'd get electrocuted or B) he's about to learn about overcurrent.
Seems a very cocky apprentice realized he did NOT know nearly as much as he thought. But he did send me back to the books to understand about grounding and WHAT I had missed.
Only when I understood the path did I BEGIN to understand the problem. It's been a life long search and I'm still ignorant, but gaining on it.
Not to mention picked up one very nifty way to get worms without digging a hole.