Well, it depends upon how you want to utilize it. The most common places are study tables, kitchens, dining tables, or side tables. Make sure that you place the device on a solid surface and below your eye level. Other than that, if you want a large room to get scented in short time, then keep the diffuser right in the center of the room. This way, the scent will diffuse in all directions to replace the foul smell of a room instantly.