Increasing the RAM to your laptop or desktop can make it faster, but only if you’re running out of memory. If your computer has enough RAM for all the programs and files you’re using at the moment, adding more will not speed up your computer.
RAM is a temporary storage space for your computer. It rations data that your computer demands to get access swiftly, such as while it's running an application or playing a game. When you close an application or game, this information goes back into long-term storage (your hard disk).
It's not possible to add more RAM to a computer because it doesn't have any permanent storage spaces. The only way to increase its memory is by buying additional modules of DRAM (dynamic random access memory) chips that connect directly into the motherboard by plugging in place of existing ones (or there may be an empty slot where one could go).