RAM is an abbreviation for Random Access Memory. This is a type of computer memory, that, unlike other storage devices such as hard disks or DVDs, enables the data to be accessed directly without reading the previous content located within it. Every time an application is launched, it is stored inside the RAM, because it could be accessed much quicker than if it was read from another media device. In terms of the web hosting service itself, extra RAM means that more web applications can work at the same time on a particular web server, especially when they are resource-demanding and are accessed by a large number of people at the same time. In contrast to a shared web hosting package in which the resources of a particular account could be flexible and often depend on what other users consume as well, a VPS includes a guaranteed amount of RAM you can use all the time. That memory is assigned to one server only and will not be used by other customers even in case it's not used.