Random access memory (RAM) is computer jargon. It layman terms, it means desk space. The more RAM you have, the more desk space you have. More room for files, notes and programs.
Put too much stuff on your proverbial desk, your computer craps out. Freezes. Blue-screens. Or just becomes devastatingly slow.
The human brain works the same way: Limited desk space for files, notes and programs. The difference is that you can’t go to Best Buy and buy more RAM.
Just gotta close some programs.