Which Google Analytics feature relies on machine learning and Google AI for measuring conversions that can't be spotted through direct observation?

The Key event modeling feature is correct because it uses machine learning and Google AI to estimate conversions that cannot be directly observed, such as when users interact with your site or app but do not trigger measurable events. This allows Google Analytics to provide a more complete view of conversion activity by predicting likely outcomes based on patterns in the available data, whereas standard conversion events, conversion windows, and attribution paths rely on directly tracked interactions.