Jeremy: When your parents live together, they are both responsible for taking care of you. When your parents stop living together, this might change.
One parent might have sole custody of you. This means you live with one parent, who takes care of you everyday. Or both parents might have custody. This is called joint custody. You might live part of the time with one parent, and part of the time with the other, or live mostly with one parent—but both parents help make decisions about things in your life.
If one parent has custody, the other parent usually has parenting time sometimes called visitation. This means that you visit the other parent. There are lots of different ways to arrange how you spend time with that parent.
Your parents might be able to agree on custody and parenting time themselves.