I'm currently level 48 in mining and I'm wondering what this skill actually does since its description is extremely vague ("Reveals the conditions for obtaining HQ items while gathering").

Having it on or off doesn't seem to make any difference in HQ items being available in the node. It doesn't effect the % HQ drop rate. Nor does it make any difference in finding mining nodes. It never seems to make a tangible difference ever.

Is this a skill that only becomes useful later?