Real-time bidding (RTB) is a relatively new method of selling and buying online display advertising in real time one ad impression at a time.

Number of ad impressions - how many times the ad will be shown.

MarketingVox today reports that more than 50% of all the display ad impressions online in June came from just two sites.

Impression fraud is when falsely generated ad impressions affect an advertiser's account.

The benefits of behavioural tracking to the advertiser has always been more targeted ad impressions, which presumably leads to more effective advertising, and thus better product marketing.

We were getting millions of ad impressions a month [on Zebtab] but in terms of revenue it was nothing.

DoubleClick will charge a commission for each ad impression traded on its exchange.

Adzerk states that it serves billions of ad impressions per month, and has over 100 paying customers on thousands of sites.

The new voluntary standards include a detailed and recommended process for counting ad impressions, the basic measurement units of audiences for online ads.

However not all banner ad impressions realize a benefit.