RAM, that refers to Random Access Memory, is a computer storage media that could be accessed noticeably faster than a hard disk drive, due to the fact that the data can be read randomly, skipping the bytes before the needed information 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 programs you shall be able to run all at once and the more people shall be able to explore your Internet sites without any effect on the site’s/server’s performance. In contrast to a disk drive, however, the RAM is used for non permanent storage purposes, due to the fact that the information is lost as soon as the power is shut off. If you use a shared web hosting account, the physical memory your scripts are able to use may be limited and may change based on what the other customers on the same machine use. Through a virtual or a dedicated server, however, you'll have a set amount of RAM that will not be used by anyone else even when you don't use it at a certain time.