RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, that, in contrast to other storage devices such as hard disks or DVDs, allows the data to be accessed directly without reading the previous content saved in it. Whenever a program is launched, it is stored in the RAM, since it could be accessed considerably quicker than if it was read from another media device. With regard to the hosting service itself, extra RAM means that more web applications can operate all at once on a particular server, particularly when they are resource-demanding and are accessed by a large amount of people at the same time. Unlike a shared web hosting plan where the system resources of a given account could be flexible and often depend on what other users consume as well, a VPS provides a guaranteed amount of RAM you can use all the time. That memory is allotted to one server only and shall not be used by other clients even if it is not being used.