Digital advertising can provide detailed metrics on how advertising campaigns are performing. The most fundamental metrics are impressions (the number of times an ad has been served) and clicks. Here are some insights into how Ad Manager counts those metrics.
Ad Manager counts an impression each time a creative is downloaded in the user's device and has begun to load. Note that the impression is counted before the creative is fully downloaded and viewed by the end user.
Google Ad Manager counts mobile app impressions in alignment with industry standards. A mobile app impression is counted when one or more pixels of the ad creative is visible on a device's screen. Currently, Ad Exchange creatives, some Ad Manager creative formats, and Open Bidding use this methodology.
Learn more about how Google Ad Manager counts mobile app impressions
All creative types use delayed impressions. This means that Ad Manager doesn't count an impression until the creative sends an impression request to Ad Manager. Because of this secondary request, the "Total code served count" metric total can be greater than the "Total impressions" value for these creative types.
By default, Ad Manager counts an impression each time a creative is sent to a mobile app, but there is also the option to control impression counting for banners by using the manual impression counting feature of the Google Mobile Ads SDK, which utilizes delayed impression counting.
If your Ad Manager-trafficked creative has third-party impression tracking pixels, those will be triggered when the
mAdView.recordManualImpression() function is triggered.
Ad Manager counts an impression when the interstitial is shown to the user, not when a creative is served from Ad Manager. If an interstitial request is made and Ad Manager sends the creative to the app, but the app never shows the interstitial, an impression isn't counted.
When a user clicks on an ad creative, a click request is sent to the Ad Manager ad server. Ad Manager counts a click as soon as it receives the click request and then sends the user the defined click-through URL. Note that Ad Manager counts the click when it's received, not when the user is redirected to the click-through URL.
Ad Manager discards impressions and clicks that are considered invalid. Learn more about Ad Manager invalid traffic detection and filtration methodology