If you can’t measure results, you can’t improve them. Many Madurai businesses invest in digital marketing but still feel unsure whether it’s actually working. Reports show clicks, impressions, and traffic, yet revenue doesn’t always grow. That confusion comes from measuring the wrong things. In 2026, measuring ROI is not optional. It is the only way to judge campaign success and make smart marketing decisions. This guide explains how Madurai businesses can accurately assess digital marketing ROI — step by step. Start by defining what “success” means for your business ROI looks different for different businesses. For some, success means phone calls. For others, it means form submissions, WhatsApp enquiries, store visits, or direct sales. Before measuring anything, you must define your primary conversion action. If this is unclear, ROI tracking will never be accurate. Clear goal = clear measurement. Understand the core ROI formula Digital marketing ROI is calculated using a simple ...