PWO stands for Prefered Walk On, which means you're guaranteed a spot on the roster. A walk on is just that, you walk on....and if I recall, you don't sign papers with PWO...
Preferred walk-on offer
Not all offers come with a monetary reward. Sometimes, the reward is simply a spot on the roster. Walk-ons are far more common in college sports than most families and student-athletes realize. It’s important to understand the distinctions between the different types of walk-ons as you navigate the recruiting process.
What is a preferred walk on?
A preferred walk-on offer means the coach would like you on the team but cannot (or won’t) offer any financial assistance at least for the first year.
Can preferred walk-ons earn a scholarship? Yes, they can earn a scholarship going into a second season, but nothing is guaranteed. Some student-athletes will turn down scholarship offers at smaller schools to play for a bigger program as a preferred walk-on.
Do preferred walk-ons sign on signing day?
Technically, preferred walk-ons don’t have anything to sign on Signing Day, as they aren’t receiving an athletic scholarship. However, walk-ons are an essential part of a successful team, and college coaches want to celebrate their signing, as well. Ask your future coach about having something to sign, especially if your school is throwing a Signing day party. Don’t forget to rep your new school with some gear!
Recruited walk-on offer
A recruited walk-on offer means there is interest from the coach but no financial assistance and you must still earn a spot on the team through additional try outs or summer training camp. Although there is no financial assistance or even a guarantee of making the team, some student-athletes still view a recruited walk-on offer as a great opportunity to be play at the highest level of competition.
Unrecruited walk-on offer
Typically, this is when a student-athlete qualifies for admission to the school and plans to join the team through an open tryout. In this scenario, there is usually a conversation with the college coach prior to enrollment to confirm the student-athlete will be able to try out for the team.
There is a lot to consider with any type of walk-on offer. This is especially true if you have scholarship offers from other schools.
As far as paying for school, please see
https://studentaid.gov/understand-ai...s/scholarships
Basically, with various means to pay for the first year of college and beyond, these PWO's don't need a scholarship, but they do need to be on the team to earn one if available.