Memory is a computer component that stores programs, files and data, either on a temporary or permanent basis. Memory should not be confused with your computer’s hard drive. A hard drive stores large amounts of data on a permanent basis, whereas memory typically stores data on a more temporary basis. Your computer would not be able to perform quickly if each time you needed to retrieve information it had to access it from the hard drive. If that piece of information was stored temporarily in memory, it could be accessed quite readily. Most data entered into a computer will go into Random Access Memory (also known as RAM) first before the computer decides whether it needs to be stored in a more permanent place (ie the hard drive).
How much memory do I really need? The rule of thumb for memory is: you can never really have too much. Again, how much memory you really need will depend on what it is being used for. Aside from the CPU, the memory is the next most important component of your computer. Adding RAM can make a big difference in the performance of your computer without costing a lot of money. If you notice that your system is running slowly it may be because you are constantly having to retrieve data from the hard drive as there isn’t enough memory. If this is the case then extra RAM can make a huge difference.