The term PPI stands for Pay Per Impression where the advertiser pays an agreed amount for a set amount of times (impressions) the ad delivers to his or her website from a link or banner.

The PPI campaign is a specific target advertisement which can be set to run for any and all days of the week. The add is then displayed on desired areas of the website such as header, footer or random zone placement.

The ad pricing structure by which the advertiser pays the publisher is according to how many times the ad is shown.