RAM, which stands for Random Access Memory, is a computer storage media which could be accessed considerably faster than a hard drive, because the data can be read randomly, skipping the bytes before the needed data is reached. On a web server, the RAM is used to load scripts and web programs once they are executed, so the more RAM you may use, the more programs you will be able to run simultaneously and the more people shall be able to look through your websites with no effect on the site’s/server’s overall performance. In contrast to a disk drive, however, the RAM is employed for momentary storage purposes, due to the fact that the information is lost when the power is shut off. When you use a shared web hosting account, the physical memory which your scripts are able to use may be limited and could change according to what the other customers on the same machine use. Using a virtual or a dedicated web server, on the other hand, you will have a set amount of RAM which won't be used by others even if you don't use it at a certain time.