Glossary
eCPM (Effective Cost Per Mille)
eCPM is the effective revenue per 1,000 impressions, most often used for display advertising. It converts any earnings model into a comparable per-thousand figure.
Why it matters for your earnings
It lets you compare display-ad income against affiliate income on the same page, so you can decide whether a given placement earns more as an ad slot or an affiliate link.