RAM, which is short for Random Access Memory, is a computer storage media that is accessed way quicker than a disk drive, because the information can be read randomly, skipping the bytes before the needed info is reached. On a web server, the RAM is employed to load scripts and web applications once they are executed, so the more RAM you may use, the more apps you'll be able to run concurrently and the more people will be able to check out your Internet sites with no effect on the site’s/server’s overall performance. Different from a disk drive, however, the RAM is used for momentary storage purposes, as the data is lost once the power is shut off. If you use a shared web hosting account, the physical memory your scripts could use may be limited and may change based on what the other customers on the same hosting server use. Using a virtual or a dedicated hosting server, on the other hand, you'll have a fixed amount of RAM which won't be used by others even when you do not use it at a particular time.