ROI is return on investment, a metric that compares the profit or value generated by an activity against its cost. A common calculation is: (Net profit ÷ investment cost) × 100.
In practical digital marketing work, the important question is not just what ROI means, but how it should influence decisions. It matters because strategy keeps channels from competing with each other. When this concept is clearly defined, the team can connect budget, audience, creative, offer, tracking, and reporting to revenue instead of chasing disconnected metrics.
A strong approach should connect ROI to measurable outcomes such as qualified traffic, calls, form submissions, booked appointments, ecommerce revenue, or lower acquisition costs.
Example
Example: If a campaign costs $5,000 and produces $20,000 in attributable gross profit, the ROI is (($20,000 – $5,000) ÷ $5,000) × 100 = 300%. That number gives leadership a cleaner view of profitability than traffic or leads alone.