What does Disney Jr Dance Party FP do?

Ive never seen the Disney Jr Dance Party so unsure what the venue is like. How does having a FastPass benefit you? This is a must-do for my little ones so I want to be sure they get decent seats (are there seats??) and can see the action.

Its nice for young toddlers, they all sit on the floor and watch. I don’t think a FPP is necessary, but I know I have gotten one in the past.