You sometimes want to add some ‘randomness’ – for sound parameters, for audio effects, selection of instruments and so on. Having those triggered by incoming MIDI notes gives you some possibilities to change stuff quick and to your needs – this could be used for sound design in a studio situation and as well for a live situation during performances. The Notes to MAP Random Percentage lets you do that. If you want to go back to certain values, this could be set-up quick and easy as well.
Here is a video where you see how sound designer Chris Burt is using this device for his work.