A mirror is not just there to check your hair. A strategically placed mirror can be magical. Mirrors give an illusion of space. It can actually make a room look larger.
Mirrors also reflect light. If you angle one near a window, the light can bounce off the mirror and bring more light into the room. Make sure you are strategic about your placement. You want to avoid glare.
Whether it is framed, unframed, round or square, a mirror is a neutral and inexpensive wall accessory for any room.