RAM, that is short for Random Access Memory, is a computer storage media which can be accessed much quicker than a disk drive, simply because the data can be read randomly, skipping the bytes before the needed data is reached. On a web server, the RAM is employed to load scripts and web applications when they are executed, so the more RAM you are able to use, the more apps you will be able to run all at once and the more people will be able to check out your websites without any effect on the site’s/server’s general performance. Unlike a disk drive, however, the RAM is employed for short-term storage purposes, because the info is lost the moment the power is shut off. In case you use a shared web hosting account, the physical memory which your scripts could use may be limited and could change based upon what the some other clients on the same web server use. Through a virtual or a dedicated hosting server, however, you will have a fixed amount of RAM that will not be used by anybody else even if you do not use it at a certain time.