RAM, that means Random Access Memory, is a computer storage media that may be accessed considerably quicker than a hard disk, because 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 once they are executed, so the more RAM you are able to use, the more programs you shall be able to run at the same time and the more people shall be able to browse your sites with no effect on the site’s/server’s functionality. Unlike a disk drive, however, the RAM is used for momentary storage purposes, because the info 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 according to what the other customers on the same hosting server use. Through a virtual or a dedicated hosting server, however, you shall have a fixed amount of RAM that won't be used by anybody else even if you don't use it at a given time.