RAM, that is short for Random Access Memory, is a computer storage media that can be accessed considerably quicker than a hard disk drive, as the info can be read randomly, skipping the bytes before the needed data is reached. On a server, the RAM is used to load scripts and web apps once they are executed, so the more RAM you are able to use, the more applications you will be able to run all at once and the more people shall be able to look through your Internet sites without effect on the site’s/server’s overall performance. Different from a disk drive, however, the RAM is employed for temporary storage purposes, because the data is lost the moment the power is shut off. If you use a shared web hosting account, the physical memory which your scripts can use may be limited and can change according to what the other customers on the same machine use. With a virtual or a dedicated web server, alternatively, you shall have a guaranteed amount of RAM which will not be used by others even when you do not use it at a given time.