Click tracking allows you to measure the clickthrough rate of the links you share in your emails.
In other words, you can create a subdomain that'll allow you to make your links point to your own domain, itself pointing to c.prospectrck.com in order to track clicks.
The set-up process depends on every host. If you are having trouble with this, please check in with your network administrator or contact us at firstname.lastname@example.org
Once your CNAME is set, you can enter it in your Tracking settings.