What is fidelity?

Fidelity is how closely something copies or matches another thing.

Imagine you're drawing a picture of your favorite dog on a piece of paper. If you draw it exactly like the real one, same size, same colors, same wiggly tail, that’s high fidelity. But if you just scribble a few lines and call it a dog, that's low fidelity.

Think about copying a song from your phone to a friend’s phone. If the sound is clear, like you're both listening to the same song in the same room, that’s high fidelity. But if the music is fuzzy or you can barely hear the lyrics, that's low fidelity.

Or think of copying a picture from one paper to another. If the colors and shapes are all there, it looks just like the original, that’s high fidelity. But if the copy is smudgy or missing some parts, that’s low fidelity.

Fidelity is about how well something copies another thing, whether it's a song, a picture, or even a dog!