What does the commercial chemical composition notation "Percent dry, wet with water"mean? I am not a chemist, I develop software. I'm hoping for a general explanation I can understand in order to assist me with a project I'm working on.

Customers viewing a product online such as peroxide see 97% (dry wt.), wet with 25% water.

What does this mean? What would you expect the product to be in the form of? A powder, liquid/gel, solid in water? Any specific type of container?
I believe there is no general rule.
In your case (assuming you mean this) it is a solid. materials can have 25% and even more water and still be solids.