RAM is an abbreviation for Random Access Memory. This is a type of computer memory, which, in contrast to other storage devices including hard disk drives or DVDs, enables the data to be accessed directly without reading the previous content stored within it. Whenever a program is launched, it is stored inside the RAM, because it can be accessed considerably quicker than if it was read from another media. With regards to the hosting service itself, more RAM means that more web apps can run simultaneously on a particular server, especially if they are resource-demanding and are accessed by a significant number of people simultaneously. Unlike a shared web hosting solution in which the system resources of a certain account could be flexible and often depend on what other end users consume also, a VPS has a guaranteed amount of RAM which can be used always. That memory is allotted to one hosting server only and shall not be used by other clients even if it is not in use.