Thanks, but yeah, the article just says the following:

The observations could have considerable implications for our understanding of what goes on in other spots in our celestial neighborhood that aren't protected by a magnetic field either.

"These observations on the Moon will help us better understand the surface environment and act as a pathfinder to explore negative ion populations in other airless bodies in the Solar System," NILS principal investigator Martin Wieser explained in the statement, "from planets to asteroids and other moons."

It doesn't really say why negative ions are significant, just that they are found in places without a magnetic field and may help us understand similar places. The research seems more in-depth, and the article send to lack important details.