What key metrics do you use to measure the effectiveness of your ad campaigns? Spending on an ad campaign is just part of the equation, calculating the return is another. But chances are you might get confused trying to understand the equation between ROI vs ROMI, and ROAS, and which metric best demonstrates your ad campaign’s effectiveness. So to help you, we’ve put together this guide that explains what these 3 metrics are, and how each metric can be used to measure the success of your advertising campaigns according to 35+ experts: