RAM is an abbreviation for Random Access Memory. This is a sort of computer memory, which, in contrast to other storage devices including hard disk drives or DVDs, permits the data to be accessed directly without reading the previous content saved in it. Whenever a program is started, it is stored inside the RAM, because it may be accessed considerably quicker than if it was read from another media. In terms of the hosting service itself, additional RAM means that more web applications can operate simultaneously on a certain hosting server, especially if they're resource-demanding and are accessed by a large number of people simultaneously. In contrast to a shared web hosting solution in which the resources of a given account can be flexible and frequently depend on what other users consume also, a VPS includes a guaranteed amount of RAM which can be used always. That memory is assigned to one web server only and will not be used by other customers even if it is not being used.