RAM, that is short for Random Access Memory, is a computer storage media which is accessed way quicker than a hard drive, simply because the info can be read randomly, skipping the bytes before the needed information is reached. On a web server, the RAM is used to load scripts and web apps when they are executed, so the more RAM you are able to use, the more applications you will be able to run at the same time and the more people will be able to check out your Internet sites with no effect on the site’s/server’s functionality. In contrast to a disk drive, however, the RAM is used for temporary storage purposes, as the data is lost as soon as the power is shut off. If you use a shared web hosting account, the physical memory your scripts could use may be limited and could change according to what the some other clients on the same machine use. Using a virtual or a dedicated hosting server, however, you shall have a set amount of RAM that won't be used by anyone else even if you don't use it at a certain time.