RAM, which stands for Random Access Memory, is a computer storage media that is accessed much faster than a hard disk, as 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 when they are executed, so the more RAM you are able to use, the more applications you shall be able to run all at once and the more people will be able to surf your websites with no effect on the site’s/server’s performance. Unlike a disk drive, however, the RAM is used for momentary storage purposes, due to the fact that 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 could use may be limited and may change based on what the some other clients on the same server use. Through a virtual or a dedicated server, alternatively, you will have a fixed amount of RAM which will not be used by anybody else even if you do not use it at a particular time.