The RAM temporarily stores data. This way, your processor can easily find data that you use often. The larger the RAM, the more data your MacBook, iMac, or Mac Mini can store temporarily. This way, demanding programs run better and you can do more at the same time. Too little RAM slows down your MacBook, iMac, or Mac Mini. More RAM doesn't necessarily make your MacBook, iMac, or Mac Mini faster, but it does make it more future-proof. Programs demand more and more RAM. What's enough now, might be too little in the future.
