RAM, or Random Access Memory, is a form 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 kinds of storage devices including DVDs or HDDs where all the info must be read so as to access specific info. When you have a shared hosting account, the exact amount of memory that your web apps can use can't be fixed and may regularly depend on the free memory that's available on the physical hosting server. Using a standalone web server, however, there is always a minimum amount of physical memory that will be at your disposal at all times and shall not be assigned to other customers even if it isn't used. That's valid with our virtual and dedicated web servers.