RAM is an abbreviation for Random Access Memory. This is a sort of computer memory, which, different from other storage devices including harddrives or DVDs, enables the info to be accessed directly without reading the previous content located inside it. Every time an application is started, it's stored inside the RAM, due to the fact that it may be accessed much more quickly than if it was read from another media. In terms of the website hosting service itself, additional RAM means that more web apps can operate all at once on a certain hosting server, particularly if they're resource-demanding and are accessed by a significant number of people concurrently. In contrast to a shared web hosting plan where the resources of a particular account could be flexible and frequently depend on what other end users consume also, a VPS includes a guaranteed amount of RAM you can use always. That memory is allocated to one hosting server only and won't be used by other clients even when it's not used.