RAM, that is short for Random Access Memory, is a computer storage media that is accessed considerably quicker than a hard drive, because the information 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 after they are executed, so the more RAM you are able to use, the more apps you will be able to run simultaneously and the more people will be able to look through your websites without effect on the site’s/server’s overall performance. In contrast to a disk drive, however, the RAM is used for non permanent storage purposes, as the data is lost the moment the power is shut off. If you use a shared web hosting account, the physical memory your scripts may use may be limited and could change based upon what the other customers on the same hosting server use. Using a virtual or a dedicated hosting server, however, you shall have a set amount of RAM that won't be used by others even when you do not use it at a particular time.