Click tracking allows you to know whether or not your prospects click on the links in your emails.
You can enable or disable click tracking from Settings > Tracking:
Note: there is no option to see which links were clicked in particular.
Set up your own domain for URL Rewriting
In order to track clicks, we re-write all links included in your messages by a tracking URL. By default, we'll use a shared Prospect.io's domain but we strongly recommend you use your own domain in order to make sure your emails get delivered, as Email Service Providers tend to be suspicious about links not pointing to the sender's own domain.
Here you can read more about it and how to configure your own domain for URL rewriting.