RAM, or Random Access Memory, is a sort of computer data storage, that allows the data to be read randomly without accessing the preceding bytes before that. This makes the RAM considerably quicker than other sorts of storage devices such as DVDs or HDDs in which all the info ought to be read in order to access particular data. If you have a shared hosting account, the amount of memory your web apps can use cannot be fixed and may regularly depend upon the free memory that is available on the physical server. When using a standalone web server, however, there is always a minimum amount of physical memory which shall be available at all times and will never be assigned to other clients even if it isn't being used. That's valid with our virtual and dedicated web servers.