1
oftentimes, one of the main reasons wash day takes so long is because of the detangling process, especially if you have a tighter curl. pre-pooing with an oil or deep conditioner on damp hair helps you get through the tangles much quicker!
2
when the hair is well-moisturized from your pre-poo, it's more manageable. this'll make it easier to work through it while washing & boom! there's less chance of breakage & split ends! when the hair breaks less, you will retain your length!
3
doing a pre-poo with a hair mask or deep conditioner adds moisture to the hair so that shampooing won’t be as harsh on it. the conditioning kinda gives it a protective barrier to prep the hair for the manipulation while washing.