What is behavioural modeling for consent mode?

Behavioral modeling for Consent Mode is a machine learning model used by Google Analytics to estimate user behavior on a website when a user declines consent for cookies. When users reject analytics cookies on your website, certain data such as session length or conversions may not be captured. Behavioral modeling uses anonymized data from users who have given consent and applies machine learning to model the behavior of users who decline analytics cookies. This approach helps maintain accurate reporting and performance measurement, even with incomplete data while also respecting users’ privacy choices. 

Behavioral modeling uses observed user data from your specific Google Analytics 4 property. For accurate modeling, your property needs to collect enough data and meet the criteria to properly train the model.