No Overselling
In the hosting world, overselling means advertising attributes which a client buys, but can’t really get. Many of the options of a given hosting solution can belong to this category - HDD storage, monthly traffic, database storage space, and so on. A solution may come with unrestricted disk space, for instance, yet the majority of hosting service providers set up accounts on just a single server that can have only so many hard disks and since 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 make sure that every single user has their share, regardless that everybody has paid for limitless space. Since most internet hosting Control Panels are designed to work on a single server, lots of companies don't have any choice but to oversell, that's nothing else but tricking their customers.