Ans:- Viewable CPM (vCPM) is a digital advertising statistic that calculates the cost of showing an advertisement that is actually viewed by a user. Traditional CPM (cost per mille) estimates the cost of showing an ad 1,000 times, independent of whether or not a user sees it. vCPM, on the other hand, only considers viewable impressions, which means that the ad was displayed in a place on the user’s screen where it was visible to the user.
To be named viewable, an ad must have at least 50% of its pixels visible on the screen for at least one second, according to criteria issued by the Interactive Advertising Bureau (IAB). The vCPM measure is computed by dividing a campaign’s total cost by the number of viewable impressions.
