What is Ad Stacking?
Ad stacking is a type of mobile display and impression fraud where mobile apps or websites stack multiple ads beneath one another in a single ad placement.
While only the top ad is visible with its impression actually served, multiple advertisers are billed for the impression.
If a user clicks the top ad, a click will be registered for all ads on the stack.
Identifying Ad Stacking Fraud:
Ad stacking can be identified in instances in which multiple ad click engagements are reported under the exact same time stamp for a single ad placement.
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