What does a higher pitching moment mean? (ie -0.095 vs -0.0022) I've found that as the angle of attack increases, the moment becomes more negative. I wanted to know what does that negative value say about the characteristics of the airfoil, and what is its importance.
A negative pitching moment is stabilising: it is a nose down pitching moment, which is what is required for static stability.

If the stabilising moment of the wing profile increases with AoA, the horizontal tail volume can be smaller - less resistance.