Non-linear editing is like playing with toys that can be taken apart and put back together again whenever you want.
Imagine you have a puzzle box full of different puzzle pieces. If you made a mistake while putting the puzzle together, you could easily undo it and start over again without having to start the whole thing from scratch. Non-linear editing works in a similar fashion.
When making a movie, you film different scenes at different times, and then you put them all together in a specific order to form the story. With non-linear editing, you can change the order of the scenes, add special effects, or delete scenes you don't want without having to start all over again.
It's like having a bunch of Legos pieces, that you can attach or detach, switch places or colors, and then easily reassemble them into a new structure.
Non-linear editing allows you to work on different parts of the film at the same time, making it easier to keep track of what each scene needs. It also helps to speed up the editing process, giving you more time to focus on other parts of the film.
So, non-linear editing is the art of manipulating videos or films, and making them exactly how you want them, and every change is quick and easy to make.