As Coach Regan said, it shows that there is a matchup that could have been taken advantage of. In the future if you see this same lineup you could run an inside offense with a better SG that has 7+ IS & DR and potentially put up a good amount of points.
The issue in this game was simply your trainee most likely the handling and driving to create shots and may have not had the passing to help keep the offense running smoothly.
I think it means what it means... points per shot. It might not tell the whole story but it makes for good cliff notes.