... about Note Events like the total number of notes, their key and velocity ranges and the average velocity.
... about Wheel Events. The total number of wheel events and the overall range of the wheel events. The values of the first and the last wheel event will help you to find wheel events that are not set to "0" at the end and might produce detuned sounds.
... about all occurring patch, controller, RPN and NRPN events. Have you ever wondered why your song does not sound the way you want? There might be some patch, volume or other controller changes left.
Simply insert Midi Statistics as an insert effect for a track in the console view or in the track view and watch what happens. Midi Statistics does not alter any events.