RAM, that stands for Random Access Memory, is a computer storage media which could be accessed much more quickly than a hard drive, simply because the info can be read randomly, skipping the bytes before the needed information is reached. On a hosting server, the RAM is employed to load scripts and web programs when they are executed, so the more RAM you may use, the more apps you will be able to run all at once and the more people shall be able to explore 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 momentary storage purposes, since the info is lost when the power is shut off. In case you use a shared web hosting account, the physical memory which your scripts are able to use may be limited and might change depending on what the some other clients on the same web server use. Using a virtual or a dedicated hosting server, however, you will have a fixed amount of RAM which will not be used by others even if you don't use it at a certain time.