woop

Do you understand those things when compared to computers? Its the exact same thing, essentially. RAM is the memory that is pulled when you need something done immediately (a la opening an app). This, with the addition of the processor, is more of the "performance" category.. how fast something happens (Hence the name Random Access Memory). Obviously, the more RAM, and the faster the processor, the faster something happens, thus better "performance."

ROM/flash memory is like the harddrive to your phone. The OS (Android) is stored within here, kind of like how MS Windows is stored on your harddrive. microSD cards are like the external harddrives to computers. They are extra storage spaces that you can plug into your phone to store things like photos and songs.