Ok kiddo, so imagine you have a really fancy computer with lots of buttons and sensors, like your tablet or your mom's laptop. Evdev is a special program that helps your computer understand how to use all of those different buttons and sensors.
You see, every button and sensor has a special "code" that tells the computer what it is and what it does when you press it or touch it. But there are a lot of different codes for a lot of different buttons and sensors, and it can get confusing for the computer to keep track of all of them. That's where evdev comes in.
Evdev is like a translator that sits between your computer and all of the buttons and sensors. It helps the computer understand what each code means and how to use it in different programs or apps. So when you touch a button or use a sensor, evdev makes sure the computer knows what you're doing and what you want it to do in response.
Evdev is really important for making sure your computer works correctly and responds quickly when you use different buttons and sensors. Without evdev, your computer might get confused and not do what you want it to do, which would be really frustrating for both you and your parents. So next time you use your tablet or your mom's laptop, remember to thank evdev for making things work smoothly!