viewable impressions
A viewable impression refers to the ad impressions made by human beings. It is set by the International Advertising Bureau. IAB states that a viewable impression can be counted if and only at least 50% of the ad is displayed over 1 second on the user’s screen. Viewable impression fraud is very common in digital marketing as fraudsters create a false appearance that they got a view whereas in reality, they didn’t. This can be done using various fraudulent techniques such as pixel stuffing, fake websites, auto impressions.For more info