RAM, or Random Access Memory, is a form of computer data storage, that allows the data to be read randomly without accessing the preceding bytes before that. That makes the RAM substantially quicker than other kinds of storage devices such as DVDs or HDDs where all of the info must be read to be able to access specific information. If you have a shared hosting account, the total amount of memory that your web programs can use can't be fixed and may often be determined by the free memory that's available on the physical hosting server. Using a standalone server, however, there's always a minimum amount of physical memory that'll be readily available at all times and shall not be assigned to other customers even if it is not in use. That's valid with our virtual and dedicated hosting servers.