광고

CTR = Click Through Rate as a %, 
         divide the # of clicks by the # of page views or # of ad impressions


CPC = Cost Per Click as an average of what you are getting for each click
          , so it's total earnings divided by # of clicks


RPM = Rate Per 1000 Impressions, is just a reference # of what you are currently earning (or would be earning) for every 1000 impressions and not what you are actually earning or will be paid.. 
Take total earnings divided by # of page views or ad impressions multiplied by 1000. So whether you are actually getting 1000 impressions or not doesn't matter.