What is eCPM? Effective Cost Per Mille
eCPM stands for “Effective Cost Per Mille” but the actual meaning is “Effective Cost Per Thousands Impressions”. eCPM is the effective dollar amount (or other currency) which you are paying for advertising per one thousand impressions for your advertising. The measuring here is based on the revenues earned from advertising. For example: if you’re ad had 1,000 impressions which generated $4,000 in revenues means that you are paying $4 eCPM.
eCPM is one of the most common online advertising term used.