A Control Panel is a web-based interface using which you can control different aspects of your presence online. For example, you could create or change site files, set up and check e-mails, control databases, check visitor stats and so on. Those things are carried out through buttons and menus inside a web browser and the Control Panel could also be called ‘back office’, i.e. the admin area associated with your hosting account. Most Control Panels out there will allow you to handle all hosting-related matters, but you shall often require a different system to handle payments or to get a new domain if the company offers domain registrations. Based on the platform they employ, you may be able to use the billing account to open a support ticket to ask a question or to diagnose an issue as well, or you might have to use a 3rd system.