Pretty standard for anyone who follows anything about advertising: - CPC = Cost Per Click - RPM = Revenue Per Mille (revenue per thousand impressions) Both t

Pretty standard for anyone who follows anything about advertising: - CPC = Cost Per Click - RPM = Revenue Per Mille (revenue per thousand impressions) Both the C and R are sometimes used interchangeably - e.g. "RPC" and "CPM" mean roughly the same thing. It really just depends on which entity and which way the money's flowing if you think of the players in an advertising game: [advertiser] -> [advertising platforms - e.g. Google] -> [publisher / traffic source] One player's cost is another player's revenue.