Well, it depends on the shutter. Usually, you can just screw it back in place. But if it's broken, you might have to replace it. You can buy shutters at most hardware stores or online. Just be sure to measure your window correctly so you get the right size!

If the shutter has completely fallen off, you will need to reattach it. You can use nails or screws to do this. If the shutter is only partially detached, you may be able to fix it by using a screwdriver to pry the shutter back into place. Once it is in place, use nails or screws to secure it in place.