To calculate ROI for pop and redirect campaigns, you compare how much you earn against how much you spend. First, track the total cost of your ads. Then look at how much commission or sales you get from those campaigns. Subtract the cost from your earnings, then divide the result by the cost, and multiply by 100. That gives you the ROI percentage. This shows if the campaign is worth running or not. Without tracking tools, it can be hard to know which traffic source is really working. What other ways help measure if a campaign is profitable?