Digital artifactual value refers to how important or valuable something is, like a picture or a document, that is stored in a digital format.
Think of it like a toy you have that you really like. If it's stored in a special box, and you take good care of it, it will have a lot of value to you. The same is true for digital things.
Digital things have value because they can be saved and stored easily, and people can access them from anywhere in the world. But if they are not stored properly, they can lose their value over time.
For example, imagine you have a special drawing that you made on your computer. If you don't save it correctly, or if your computer crashes and you lose the file, the drawing will be gone forever.
That's why it's important to make sure things that have digital artifactual value are saved in a special way so they can be accessed and preserved for a long time. Just like how you might put your favorite toy in a special box to keep it safe.