ROI Return on Investment Model Slide is a tool that helps marketers to calculate the return on investment for different marketing channels and campaigns. The ROI Return on Investment Model Slide is a tool that helps marketers to calculate the return on investment for different marketing channels and campaigns. It can be used by anyone from individual marketers to large enterprises. The model has been designed in such a way so as to be easily understandable and applicable. It’s important for marketers to understand how their marketing efforts are performing so they can make changes accordingly. This model will help them with this task by providing them with an easy-to-understand metric that they can use as a benchmark over time.