Postback URL - is used to send conversions to the source or any additional services. Insert S2S postback link in the field. By default, the postbacks of theAdvanced settings are working if you configured them.
Via S2S you can send the following parameters from the tracker:
You can click on the token buttons under the URL input field and the parameter along with the token will automatically be added to the URL. When you click this button again, the parameter with the token will be removed from the URL.
When all fields are configured, click Next button to go to the next step.