RAM, or Random Access Memory, is a kind of computer data storage, which allows the data to be read randomly without accessing the preceding bytes before that. That makes the RAM a lot quicker than other types of storage devices like DVDs or HDDs where all the info ought to be read so as to access particular data. If you have a shared hosting account, the exact amount of memory your web apps can use can't be fixed and may commonly depend on the free memory that is available on the physical web server. With a standalone hosting server, however, there's always a minimum amount of physical memory that will be available at all times and shall not be allotted to other clients even when it's not used. That's valid with our virtual and dedicated web servers.