What it measures
Marketing ROI compares the net return generated by a campaign with the amount invested in that campaign.
Your result—
Attribution and margin assumptions strongly affect marketing ROI. Use the same approach when comparing campaigns.
How marketing ROI works
Formula
ROI = (gross profit attributable to campaign − campaign cost) ÷ campaign cost × 100.
Use the result
Compare the metric over time or between campaigns using the same measurement basis.