A target is anything you want to monitor that is accessible on the Internet. This could be a website, an IP address, a server or any supported application service that WebKlaxon can monitor. Your subscription comes with a maximum number of targets that can be monitored.
As long as you are under the plan's limits you can delete and add new Targets as your needs change. If a new server / website / firewall needs to be monitored simply add it as a new Target. If the need for that site no longer exists you can delete it and monitor another site.