Balanced rudder is like a big wing on the back of a ship or a plane that helps it turn left or right by controlling the flow of water or air. But some rudders are very hard to move, kind of like when you try to push a heavy door open by yourself.
A balanced rudder helps make it easier to turn the ship or plane by having a smaller part, called the counterbalance, on the opposite side that helps balance the weight. It's like having a friend help you push the heavy door open.
When the ship or plane moves, the balanced rudder can move more easily and helps the captain or pilot steer the ship or plane in the right direction. It's important to have a balanced rudder to make sure the ship or plane can turn and change direction easily and safely.