RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, which, in contrast to other storage devices like hard disks or DVDs, enables the info to be accessed directly without reading the previous content located inside it. Whenever an application is launched, it's stored within the RAM, due to the fact that it can be accessed much more quickly than if it was read from another media device. With regards to the web hosting service itself, more RAM means that more web apps can run simultaneously on a certain web server, particularly when they are resource-demanding and are accessed by a large amount of people at the same time. In contrast to a shared web hosting package in which the resources of a certain account may be flexible and quite often depend on what other users consume also, a VPS includes a guaranteed amount of RAM you can use all the time. That memory is allocated to one hosting server only and shall not be used by other customers even in case it's not used.