Definition of CTR, Page Impressions, CPC, eCPM

Some definitions from Google Adsense about CTR, Page Impressions, CPC, eCPM:

* CTR (Click hrough Rate) is the ratio in percent between the number of clicks received an Ad Units by the number of Ad Units display. For example, an Ad Units are displayed 40 times and clicked 10 times has a value of CTR 25% (10:40).

* Page Impressions is the number that shows how many times the page containing the Ad Units opened by visitors. Its value is not affected by the quantity Ad Units that is in the relevant pages.

* CPC (Cost Per Click) is the amount of money that would be obtained by a specific publisher Ad Units when clicked. CPC values of each Ad Units vary and are determined by many factors, including Perfomance publisher and the publisher's site quality. But in general, the maximum value possible is 20% of the bid value offered by the advertiser dynamic.

* ECPM (Effective CPM) eCPM is the result of the division between the amount of revenue the publisher with the number of page impressions (as of 1000) which he got from iklan2nya. For example, publishers who produce $ 200 than 50,000 impressions CPM will have a value of $ 4 ($ 200/50).