App Files are a way to import files into an Application. App Files are managed through the App Files command or through the + button next to related properties in the Block Properties of a Page. Some Blocks allow the selection of App Files for some Block Properties.
The App Files explorer allows you to use, rename, delete, and perform more actions on an uploaded file. App Files are useful in many scenarios, for example, if you need specific files to integrate Unity or D3 Visualizations onto the page.