RAM, that is short for Random Access Memory, is a computer storage media which could be accessed much faster than a hard drive, simply because the information 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 once they are executed, so the more RAM you can use, the more apps you will be able to run concurrently and the more people will be able to surf your websites without effect on the site’s/server’s general performance. Unlike a disk drive, however, the RAM is used for short-term storage purposes, as the data is lost the moment the power is shut off. In case you use a shared web hosting account, the physical memory that your scripts may use may be limited and might change based on what the other customers on the same hosting server use. With a virtual or a dedicated web server, on the other hand, you shall have a set amount of RAM that won't be used by others even when you do not use it at a particular time.