The phrase "few purposes" means that something is done or used for only a small number of reasons, or it serves very limited functions. Full definition
Giving a child a bath or a shower at night has a few purposes: it cleans your child after a long day of running, jumping, climbing, playing, and whatever else that has caused your child to be messy and / or dirty. (verywellfamily.com)
But this cycle comes with a few purposes, good ones. (checkpregnancy.com)