RAM is an abbreviation for Random Access Memory. This is a sort of computer memory, which, unlike other storage devices including hard disk drives or DVDs, permits the information to be accessed directly without reading the previous content stored in it. Anytime an application is launched, it is stored within the RAM, because it could be accessed considerably faster than if it was read from another media device. In terms of the website hosting service itself, more RAM means that more web applications can run at the same time on a particular hosting server, particularly if they are resource-demanding and are accessed by a great number of of people simultaneously. Not like a shared web hosting package in which the resources of a particular account could be flexible and often depend on what other end users consume too, a VPS provides a guaranteed amount of RAM which you can use at all times. That memory is assigned to one server only and will not be used by other customers even when it is not being used.