Okay kiddo, let me explain 2k resolution to you. So you know how when you watch a video or movie on your TV, computer or tablet, it has a bunch of small dots called pixels? Those pixels are what make up the picture you see on the screen.
Now, 2k resolution means that there are about 2,000 pixels lined up horizontally across the screen. That's a lot of pixels! The more pixels there are, the sharper and more detailed the picture looks.
Think of it like this - if you were to draw a picture with only 10 crayons, it might look pretty good but it wouldn't be as detailed as if you had 100 crayons to work with. 2k resolution gives you way more "crayons" to make your picture look really awesome.
So when you watch something in 2k resolution, you'll notice that everything looks super clear and crisp. You'll be able to see all the little details in the picture, like the tiny hairs on a fuzzy animal or the wrinkles on someone's face. It's almost like you're right there in the scene!
Hope that helped explain it to you!