RAM is an abbreviation for Random Access Memory. This is a sort of computer memory, which, different from other storage devices including hard disks or DVDs, permits the info to be accessed directly without reading the previous content located in it. Anytime an application is launched, it is stored in the RAM, because it could be accessed considerably faster than if it was read from another media device. With regard to the website hosting service itself, more RAM means that more web applications can operate concurrently on a given hosting server, particularly if they are resource-demanding and are accessed by a significant number of people simultaneously. In contrast to a shared web hosting plan in which the system resources of a certain account can be flexible and sometimes depend on what other end users consume too, a VPS includes a guaranteed amount of RAM that can be used at all times. That memory is allocated to one server only and shall not be used by other customers even in case it is not used.