RAM, which refers to Random Access Memory, is a computer storage media that may be accessed considerably faster than a disk drive, because the information can be read randomly, skipping the bytes before the needed data is reached. On a server, the RAM is employed to load scripts and web programs once they are executed, so the more RAM you may use, the more applications you shall be able to run simultaneously and the more people shall be able to check out your Internet sites with no effect on the site’s/server’s functionality. Unlike a disk drive, however, the RAM is used for momentary storage purposes, since the info is lost when the power is shut off. When you use a shared web hosting account, the physical memory your scripts are able to use may be limited and could change according to what the other customers on the same hosting server use. With a virtual or a dedicated web server, however, you shall have a guaranteed amount of RAM which will not be used by anybody else even when you do not use it at a given time.