RAM is an abbreviation for Random Access Memory. This is a type of computer memory, which, in contrast to other storage devices including hard disks or DVDs, permits the info to be accessed directly without reading the previous content located in it. Whenever a program is launched, it's stored inside the RAM, due to the fact that it may be accessed much more quickly than if it was read from another media device. With regards to the website hosting service itself, additional RAM means that more web apps can operate all at once on a given hosting server, especially if they're resource-demanding and are accessed by a large number of people at the same time. Unlike a shared web hosting plan where the resources of a given account may be flexible and often depend on what other end users consume also, a VPS provides a guaranteed amount of RAM you can use at all times. That memory is assigned to one web server only and shall not be used by other customers even if it is not in use.