A screen saver is like a picture show that starts playing on your computer screen when you are not using it for a while. It helps to prevent something called "burn-in." Burn-in can happen when an image or words stay on the screen for too long and then become "stuck" on the screen, even after you close the program or turn off your computer.
When your computer is inactive, the screen saver starts playing different pictures or designs, and it keeps changing every few minutes. It can be anything from funny cartoons, pictures of animals or nature, or even words moving around the screen. Some screen savers are even interactive, which means you can play games or move things on the screen.
The screen saver is like a little friend for your computer. It helps to keep the screen healthy and prevent burn-in. Plus, it's also fun to watch and adds a little bit of personality to your device!