NCAA has many rules concerning how the players and the coaches should act.
The rules concerns academics, communication with coaches, amateurism etc.
In order to have a smooth process and comply there are parts of the rules that you need to know and understand.
When can a coach contact you and in what form?
When can a coach come see you play?
How many schools can you visit?
What is important to know in order to qualify as an amateur?
And many many more