If you have had an Internet hosting account before, you may have encountered a situation where you pay money for some unlimited feature only to discover later that it's actually limited and you have some preset quota. This could happen with the hard disk space, the monthly bandwidth, the database storage and other features that many Internet hosting providers offer in a way which is different from what you will really receive. That's the so-called overselling, which service providers use to attract customers even though they're aware that they are unable to provide their customers with the features they promote usually due to the nature of their hosting platform or in the case of the resellers - because they have some limits from the actual host company.