When the form is opened, PRO captures the public UTM parameters and also checks known click-ID parameters in order to derive an advertising platform. Supported source labels include Google Ads, Meta/Facebook Ads, Microsoft/Bing Ads, TikTok Ads, LinkedIn Ads, X Ads, Snapchat Ads and Yandex Ads, for example.

If a valid internal tracking code is recognised, the UTM values stored with the saved tracking link take precedence. For a waiting-list offer, the attribution can be carried over when the entry is converted into a registration.