RAM, which means Random Access Memory, is a computer storage media that could be accessed noticeably faster than a hard disk, simply because the information can be read randomly, skipping the bytes before the needed info is reached. On a server, the RAM is employed to load scripts and web programs when they are executed, so the more RAM you may use, the more applications you'll be able to run simultaneously and the more people shall be able to look through your Internet sites with no effect on the site’s/server’s performance. In contrast to a disk drive, however, the RAM is used for short-term storage purposes, because the data is lost when the power is shut off. If you use a shared web hosting account, the physical memory which your scripts are able to use may be limited and may change depending on what the other customers on the same hosting server use. Through a virtual or a dedicated hosting server, however, you'll have a set amount of RAM which will not be used by others even when you don't use it at a particular time.
