Is 500 kwh usage @ 3pm going to bill/charge me the same @ 3am?

Online tips about "how to save $ on electriicty" says to use electricity during the night. But when I get my electricity bill, I don't see any sort of hourly or rate breakdown. I simply see, 2000 kwH @ .10/kWh. So does it make a difference to me? Does this tip only apply to those individuals who specifially sign up for this type of hourly saving?

(I could care less about ERCOT and helping them out)