Planograms, also known as plano-grams, plan-o-grams, schematics and POGs, are visual representations of a store's products or services on display. They are considered a tool for visual merchandising. According to the Merriam-Webster Dictionary, a planogram is "a schematic drawing or plan for displaying merchandise in a store so as to maximize sales." The effectiveness of the planogram can be measured by the sales volume generated from the specific area being diagrammed.