The package protects against the unexpected removal of images and files - media used in documents.
Protect Used Media plugin is efficient and straightforward because it uses the built-in media references and relations that have been available since Umbraco 8.6.0.
All you need is to install the package, and the content editors will not be able to delete media files that are in use. This will protect the website from broken images and links.
More info about Umbraco built-in references you can find at: https://our.umbraco.com/Documentation/Extending/Property-Editors/Tracking/index-v8