RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, that, unlike other storage devices like hard disks or DVDs, permits the data to be accessed directly without reading the previous content located in it. Whenever a program is started, it's stored in the RAM, as it can be accessed considerably quicker than if it was read from another media device. In terms of the hosting service itself, additional RAM means that more web apps can operate simultaneously on a particular hosting server, particularly if they're resource-demanding and are accessed by a great number of of people simultaneously. Unlike a shared web hosting plan in which the system resources of a particular account may be flexible and sometimes depend on what other users consume too, a VPS features a guaranteed amount of RAM you can use always. That memory is allotted to one server only and shall not be used by other clients even if it is not being used.