Computers are always loading things in to figure on — like applications and data — so setting them aside for later. RAM is your computer’s memory. In contrast, a computer’s magnetic disc or SDD is its remembering, where things are stored more or less permanently.
Every information processing system has RAM, whether it’s a personal computer (running Windows, MacOS, or Linux), a tablet or smartphone, or maybe a special-purpose data processor (such as a sensible TV). Nearly all computers even havehow to store information for longer-term access, too. But the working processes are exhausted RAM.