RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, that, in contrast to other storage devices including hard disk drives or DVDs, permits the info to be accessed directly without reading the previous content located in it. Whenever an application is launched, it's stored within the RAM, due to the fact that it may be accessed much faster than if it was read from another media. With regards to the hosting service itself, extra RAM means that more web applications can operate concurrently on a particular web server, particularly when they are resource-demanding and are accessed by a significant number of people at the same time. Different from a shared web hosting package in which the system resources of a given account could be flexible and quite often depend on what other users consume too, a VPS includes a guaranteed amount of RAM which can be used at all times. That memory is allocated to one server only and shall not be used by other customers even when it's not used.