RAM is an abbreviation for Random Access Memory. This is a sort of computer memory, that, in contrast to other storage devices such as hard disks or DVDs, permits the information to be accessed directly without reading the previous content located in it. Whenever a program is started, it's stored within the RAM, since it may be accessed considerably quicker than if it was read from another media. With regard to the hosting service itself, extra RAM means that more web apps can run simultaneously on a particular web server, particularly if they're resource-demanding and are accessed by a large amount 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 end users consume also, a VPS provides a guaranteed amount of RAM that can be used all the time. That memory is allotted to one hosting server only and shall not be used by other clients even if it's not in use.