This is a very important topic. I will name the most important goals of juvenile corrections, but first let me name the agencies that are involved: the police, prosecutors, courts, and the Department of Juvenile Corrections.
First, juvenile correction seeks to act as a deterrent. Part of the aim is to deter other youths from breaking the law and acting in a way that would not benefit society.
Second, juvenile correction seeks to work with parents to create stable homes and a stable society. In connection to the last point, part of the mission is to protect society as well.
Third, juvenile corrections also exists to uphold the law. There is, of course, an understanding that the people in view are minors and have special needs, but there is still an element of upholding the law.
Fourth and most importantly, juvenile corrections also seeks to the best of its ability to reform minors to become good citizens.
The state of Wisconsin succinctly speak of what other states also generally agree upon. I quote:
"[Juvenile corrections exists] to promote a juvenile justice system capable of dealing with the problem of juvenile delinquency, a system which will protect the community, impose accountability for violations of law and equip juvenile offenders with competencies to live responsibly and productively."
In short, we can say that juvenile corrections seek to protect minors and society.