Okay kiddo, let me explain. You know how movies and TV shows have pictures that you can see? Well, 5k resolution means that there are 5,000 tiny dots on the screen that make up the picture.
Think of it like a big coloring book page. If you use small crayons, you can color in a lot of details and make the picture really clear. That's kind of like what 5k resolution does. It uses really small dots to make the picture really clear and sharp.
When you watch something in 5k resolution, it's like you're watching it in really, really high quality. You can see all the little details and it looks super cool. But you need a special TV or computer screen to be able to see something in 5k resolution.
So basically, 5k resolution means a really clear and detailed picture with lots of tiny dots. Cool, huh?