Revenue per mille

Revenue per mille (RPM) is the estimated earnings that accrue for every 1000 impressions received (in Latin, "mille" means thousand), a commonly used measurement in radio, television, newspaper, magazine, out-of-home, and online advertising. It is used in marketing as a benchmarking metric to calculate the relative cost of an advertising campaign or an ad message in a given medium. It is calculated by dividing the estimated earnings by the number of page views, impressions or queries received, then multiplying by 1000.
References.
De Guzman, C. X. (2013, January/February). TrTalos discoveries. Retrieved 23 July 2016, from https://www.youtube.com/channel/UCqmNMh05jqrmhaNMOPx-Ykg