RAM, that means Random Access Memory, is a computer storage media which can be accessed considerably quicker than a hard disk drive, due to the fact that the data 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 after they are executed, so the more RAM you are able to use, the more programs you'll be able to run all at once and the more people will be able to explore your Internet sites without any effect on the site’s/server’s overall performance. Different from a disk drive, however, the RAM is employed for temporary storage purposes, since the data is lost as soon as the power is shut off. If you use a shared web hosting account, the physical memory your scripts may 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, on the other hand, you shall have a set amount of RAM that won't be used by anybody else even if you do not use it at a certain time.