Tracking the effectiveness of your marketing campaign is an essential part of maximizing your return-on-investment (ROI). It will also help you to modify the strategy and fine-tune the campaign whenever necessary. Take note that a lot of changes can occur over the duration of your marketing campaign. Tracking direct mail response is not a new concept. However, despite its popularity, its real importance is sometimes underestimated. Because the benefits of direct mail are multiple, it is important to capitalize on those benefits by accurately tracking your results. Using a 1-800 number makes analysis of your results easy.