Pay Per Impression (PPI) is an option advertisers can use to reach potential customers. While the advertiser will only pay for views, customers can be redirected to the company website within a simple click. 

The cost of PPI varies based on the specific ad and industry, but there is commonly a flat fee for every one thousand impressions . This is known as CPM, or cost per thousand impressions. 

To calculate PPI, use the CPM formula below. The price of one thousand impressions is expressed by the value CPM.