RAM, that stands for Random Access Memory, is a computer storage media that may be accessed considerably quicker than a disk drive, as 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 after they are executed, so the more RAM you may use, the more programs you shall be able to run all at once and the more people shall be able to look through your sites without effect on the site’s/server’s general performance. In contrast to a disk drive, however, the RAM is employed for temporary storage purposes, as the information is lost when the power is shut off. In case you use a shared web hosting account, the physical memory that your scripts could use may be limited and might change depending on what the other customers on the same server use. Through a virtual or a dedicated hosting server, alternatively, you'll have a guaranteed amount of RAM which will not be used by others even if you don't use it at a given time.