RAM, which is short for 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 info can be read randomly, skipping the bytes before the needed info is reached. On a server, the RAM is used to load scripts and web applications after they are executed, so the more RAM you may use, the more applications you will be able to run concurrently and the more people will be able to explore your Internet sites with no effect on the site’s/server’s performance. Different from a disk drive, however, the RAM is employed for non permanent storage purposes, due to the fact that the information is lost as soon as the power is shut off. In case you use a shared web hosting account, the physical memory your scripts can use may be limited and may change based on what the other customers on the same hosting server use. With a virtual or a dedicated web server, however, you shall have a set amount of RAM which will not be used by anybody else even if you do not use it at a particular time.