RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, which, 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 inside it. Every time an application is launched, it's stored within the RAM, since it may be accessed much quicker than if it was read from another media. With regard to the hosting service itself, more RAM means that more web apps can work concurrently on a given web server, particularly when they are resource-demanding and are accessed by a large amount of people simultaneously. In contrast to a shared web hosting package where the resources of a particular account may be flexible and sometimes depend on what other end users consume as well, a VPS features a guaranteed amount of RAM you can use all the time. That memory is allocated to one web server only and shall not be used by other clients even when it's not being used.