The following was published on Canvas Vows. 

Creating a gallery wall is a simple way to add style, design and personal touches to any room, without the hassle of painting or wallpaper. Feature walls should be used to help define a living space and are a fun and easy way to personalize your home. If you have an open concept living room, a feature wall (AKA: gallery wall or accent wall) can help to define the space in order to highlight the dining room, for instance.