In the Internet hosting world, overselling means advertising benefits which a client buys, but cannot really get. Many of the attributes of a given website hosting plan can fall under this category - hard disk storage, monthly traffic, database storage space, and many others. A package may come with unlimited disk space, as an illustration, however the majority of hosting service providers set up accounts on a single server which can have only so many hard disks and considering that all of the customers upload content, there'll be no space left on the server sooner or later or there'll be some secret quotas to ensure that every single client has their share, although everyone has paid for unrestricted space. Since most internet hosting Control Panels are designed to work on a single server, a lot of companies don't have any choice but to oversell, that is nothing else but tricking their clients.