RAM, or Random Access Memory, is a type of computer data storage, that enables the info to be read randomly without accessing the preceding bytes before that. That makes the RAM significantly faster than other types of storage devices like DVDs or HDDs in which all the information has to be read to be able to access certain data. If you have a shared hosting account, the amount of memory that your web apps can use can't be fixed and may sometimes be determined by the free memory which is available on the physical server. When using a standalone server, however, there's always a minimum amount of physical memory which shall be available at all times and will not be allotted to other clients even if it's not used. That is valid with our virtual and dedicated web servers.