When performing app install attribution or deferred deep linking, it is necessary to match a user in a mobile web browser to the user on the app post-install. Since there are no common identifiers between mobile web browsers and mobile apps, attribution and deep linking companies must rely on probabilistic modeling.
At its core, probabilistic modeling is any form of attempting to connect a browser user to an app user without having 100% certainty that they are the same user.
Historically, MMPs have also used the term fingerprinting as a name for what is more accurately described as “point-in-time probabilistic modeling.”
As of iOS 14, probabilistic modeling can only be used for device-level ad attribution on iOS if users explicitly consent to device-level ad tracking via Apple’s App Tracking Transparency framework. If users do not opt in, SKAdNetwork, Apple’s attribution framework that uses aggregate data only, is the only acceptable attribution alternative.
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