What You Will Need
Knowledge of Bulk Actions and/or the File Manager
Step 1 - Access your File Manager
From your Library, locate and click on the file you want to customize to launch its File Manager.
Step 2 - Add Tags to the File
Once inside the File Manager, click Content Tags.

From here, you can search through or create Content Tags, remove existing Content Tags, and Save your changes.

What You Can Do Now
Build a Widget using Folders and Tags
Search your internal media library and filter with Tags