RAM, or Random Access Memory, is a kind of computer data storage, that permits the information to be read randomly without accessing the preceding bytes before that. That makes the RAM significantly faster than other sorts of storage devices including DVDs or HDDs where all of the data must be read so as to access certain data. If you have a shared hosting account, the exact amount of memory your web apps can use can't be fixed and may often depend on the free memory that is available on the physical server. When using a standalone hosting server, however, there is always a minimum amount of physical memory that shall be at your disposal at all times and will not be allocated to other customers even when it is not being used. That is valid with our virtual and dedicated servers.