Cost Per Impression

Cost Per Impression is the measured of cost that one will pay when their ad is shown per one thousand impressions. It refers to the cost of traditional advertising or internet marketing or email advertising campaigns, where advertisers pay each time an ad is displayed. A website that serves ads based on CPI doesn’t need the user to click on the ad – each appearance of the ad in front of a user counts as one impression. It is a vital metric to monitor.