RAM is an abbreviation for Random Access Memory. This is a kind of computer memory, that, in contrast to other storage devices like harddrives or DVDs, enables the info to be accessed directly without reading the previous content saved in it. Anytime a program is launched, it is stored inside the RAM, due to the fact that it could be accessed much more quickly than if it was read from another media. With regard to the website hosting service itself, extra RAM means that more web apps can work concurrently on a certain web server, particularly when they're resource-demanding and are accessed by a significant number of people at the same time. Unlike a shared web hosting solution in which the system resources of a given account could be flexible and often depend on what other users consume too, a VPS includes a guaranteed amount of RAM you can use all the time. That memory is allotted to one web server only and will not be used by other clients even when it's not used.