Shared parenting means that both parents take care of their children after a divorce or separation. This means that Mom and Dad share the job of taking care of their kids, like giving them food, clothes, medicine, and love.
It's like when you have a toy that you both really like, and your parents say that you have to take turns playing with it. The toy belongs to both of you, but you need to share it.
With shared parenting, it's the same thing, but with taking care of your children. It's important because both parents love their children, and it's fair that they both get to spend time with them and take care of them.