View-through attribution, also referred to as impression tracking, is a digital advertising model that credits a conversion, such as an app install, to a prior ad view. It enables advertisers to attribute a conversion to a particular ad campaign, even if the user didn’t interact by clicking the ad. This model recognizes that ad impressions play a causal role in eventual conversions. View-through attribution offers a holistic and precise evaluation of mobile user acquisition campaign effectiveness, complementing last-click attribution and similar models.