Install validation is a verification by the App Store or Google Play that an app was in fact installed for a given campaign.
What is install validation?
In order for an app install to be registered by the App Store or Google Play, it needs to first go through the process of being validated.
Why is install validation important?
Install validation is a key signal in the fight against mobile app install fraud.
The confirmation received from the appropriate platform is factored in alongside other indicators (such as click time to install) for confirmation of a fraudulent or legitimate installation.