The quantization is to “reduce” the amount of needed storage. Some devices, as an example, produce hundreds of “events” per hour. For graphing purposes, you might only want to keep 5 per hour. Quantization allows the user to select “how” to reduce those events. For example: If I am graphing the High temperature of the day, I would use “max” and NOT “average”. Make sense?
For your purposes, if you only have events once per hour, I would suggest no quantization.