It is a method of folding linen that has proven to be an effective way to make piles of bath towels, etc also nestle well together, in their designated area of the linen cupboard.
It eliminates any potential irritation due to not being able to quickly find what you need. Should several people contribute to sorting, folding and putting away linens, it makes for a very quick means of helping everyone know where to put everything within the actual cupboard, and on particular shelves.
Time is precious. Taking the time to fold everything in a uniform fashion provides the opportunity to be thrifty with what time and energy we each have in any given day.
These very practical time efficient techniques, can prove to also be effective clutter busters for a busy household. I recommend finding out what works best for you and your household. Go for it.