eCPM?

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I'm not sure I understand what this is and I have read the short blurb on Adsense about it. I've been doing Adsense on my site for two full days. The first day the eCPM was about $15. Today it is $40. Could someone tell me what this is and why the big difference?

Thanks,
Barry
#search engine optimization #ecpm
  • From The Adsense Site

    From a publisher's perspective, the effective cost-per-thousand impressions (eCPM) is a useful way to compare revenue across different channels and advertising programmes.

    It is calculated by dividing total earnings by the number of impressions in thousands. For example, if a publisher earned $180 from 45,000 impressions, the eCPM would equal $180/45 or $4.00.

    However, please keep in mind that eCPM is a reporting feature that does not represent the actual amount paid to a publisher.
  • well e-cpm means effective cost per impression..........it is the way that you can calculate your CPM........i.e if you get 45,000 visitors and your CPM is 100$ then effective CPM is calculated on basis of per 1000 impressions...

    it will be calculated as 100/45000*1000 which will be equal to US $ 2.20.
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    eCPM?

    I'm not sure I understand what this is and I have read the short blurb on Adsense about it. I've been doing Adsense on my site for two full days. The first day the eCPM was about $15. Today it is $40. Could someone tell me what this is and why the big difference? Thanks,