Privacy & Security: Window shutters provide better control over privacy compared to curtains and blinds, and if they're wood or another type of hard and strong material, they also improve the security, as they create a barrier to help prevent unwanted guests climbing through your windows.
Energy Efficiency: Shutters provide insulation, which can help keep your home cool in the summer and warm in the winter. Shutters will keep the heat inside your home for longer when they're closed at night. On the other hand, during a hot day, you can keep the shutters closed so that the heat of the sun has less of an impact on the internal temperature of your home.
Aesthetics: High quality window shutters come a wide variety of materials, styles and designs, allowing you to not just get the practical benefits, but they can improve the aesthetics of your home.