ROI: return on investment

Return on investment (ROI) is a ratio between net profit (over a period) and cost of investment (resulting from an investment of some resources at a point in time). A high ROI means the investment's gains compare favorably to its cost. As a performance measure, ROI is used to evaluate the efficiency of an investment or to compare the efficiencies of a number of different investments.

ROI is a key component of any successful marketing strategy, as it can help to improve the ROI of your marketing efforts.