The TrafficBack URL is a feature that allows you to redirect visitors to another link or page after they have successfully subscribed or opted out of the subscription. It's a useful tool for additional monetization of your traffic.

Here's how the TrafficBack URL works:

1. You set the desired link in the TrafficBack URL field when creating a source.

2. After the visitor subscribes or opts out, the system automatically redirects them to the URL specified in the "TrafficBack URL" field.

3. The specified page contains an offer or any other monetization tool that allows you to reprocess the traffic.