What are Impressions?
An impression is when your advert is displayed to a potential user.
For example when a user types in a search term relational to your app, your apps advert then displays. The user will then either tap the advert or continue to scroll.
So by definition, an impression is when your advert is displayed to a user.
This is why it so important to get your metadata right with supporting screenshots and a preview video where possible.
Cost per download
Event tracking and attribution
Protecting your brand
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