ROI and ROO Methodologies are effective tools that help businesses to measure the impact of their marketing campaigns. ROI and ROO are two tools that measure the business impact of marketing campaigns. ROI is a financial metric that measures how much money a company spends on marketing in comparison to the amount of revenue it generates from those campaigns. ROI can be calculated by dividing total revenue by total costs. ROO is a qualitative metric that helps businesses understand how well their marketing efforts are performing, such as customer satisfaction and loyalty.