Pay Per Impression (aka CPM) is one of the online payment models by which advertisers pays for every 1000 impressions of their advertisement. Prices typically range from $1 to over $50 per thousand impressions. This is an ideal method of payment for advertisers who want to guarantee only the number of people who sees their banner. The “M” in CPM is from the Roman numeral for 1000. The Roman numeral M was derived from the latin word “mille” meaning “thousand”.
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