Return on investment, or more commonly ROI, is a measure of the return generated by a specific investment. ROI differs from ROAS (return on ad spend) in several ways that are covered below. ROI measurements can be done a number of ways—some may be a gross estimate of ROI, while others may be a profit driven evaluation of ROI. In many cases ROI is used as a broad or general figure that doesn’t account for operating costs, profit margins, or overhead. In that regard ROI is a good metric that allows you to isolate campaign performance and execution from other aspects of your business—like packaging, pricing, product, etc.