If I have total sets, I can find out average reps per set. Eg. If a workout has 75 total reps and 15 working sets, I know the average reps are 5, which means my athletes are training at approx 85% for the defined period (an single workout in this example). Helps me cross reference that I’m prescribing appropriate load & load volumes, as well I can compare expected (prescribed) vs actual (athlete results).