RAM, or Random Access Memory, is a form of computer data storage, which allows the information to be read randomly without accessing the preceding bytes before that. That makes the RAM significantly quicker than other types of storage devices including DVDs or HDDs in which all the data needs to be read in order to access specific info. If you have a shared hosting account, the total amount of memory which your web apps can use may not be fixed and may regularly rely upon the free memory that is available on the physical hosting server. When using a standalone web server, however, there is always a minimum amount of physical memory that'll be at your disposal at all times and won't be allocated to other clients even when it is not being used. This is valid with our virtual and dedicated servers.