In the world of digital marketingDigital marketing is the component of marketing that uses the Internet and online based digital technologies such More, Return on Investment (ROI)Return on investment, or ROI, is a mathematical formula that investors can use to evaluate their investments and judge More is known as the measure of profit or loss generated on your marketing campaign activities. A positive ROI means that a campaign made more money than what was spent on it—and vice versa for negative ROI.