Glossary · Metrics
ROI— what it means in affiliate marketing
Return on investment: profit as a percentage of what was spent.
The default scoreboard in affiliate marketing, and routinely quoted before the hold has cleared — which is to say, before the revenue exists. ROI on approved conversions and ROI on delivered ones are different claims.
Related terms
| Term | Definition |
|---|---|
| EPC | Earnings per click: total affiliate earnings divided by clicks sent. |
| ROMI | Return on marketing investment: the same ratio as ROI, measured on marketing cost specifically. |
| KPI | The agreed numbers a campaign or a role is judged on. |
Entry updated 21 July 2026. All 276 terms in one page.
