Ann: New Lithium and Rare Earths Targets Identified at Aston, page-6

No lesson here, but happy to add my opinion.

Firstly, I wouldn't be invested here if I was confident in the management.
Next, I'm looking for what the company GEOs state in their dialogue that accompanies the announcements. And trying to read between the lines. It takes multiple re-reads for me.
From what I can gather PPM at the soil or rock chip level is standard practice and anything above around 100 could indicate further investigation is worthwhile. Depending on GEOs interpretation that looks into such things as whether the sample is in transported cover and all those sorts of considerations. That's why you have to have faith in the team.

As is said very often in exploration company's threads, "the drill bit will do the talking" simple as that.
Also, you have to have endless patience. Lots of information is needed to form a decent plan of attack for the expensive phase that involves drilling.

Could be all crap, but that's my amateur opinion.
Waiting, watching and absorbing any piece of related information I can gather. (and adding )