If desired, you can add Media Tags to help organize the files in your Library. This is optional; use only if you have a lot of images and need to categorize them for ease of re-use.
Both Editors and Site Builders can create and use Media Tags, but only Site Builders can edit/delete existing Media Tags.
When you upload a photo, you will see an option to add Media Tags to the photo you've just uploaded to the server.
This is an auto-complete field, which allows you to either select an existing Tag, or add a new one.
When adding photos from your Library, select a Tag in order to filter photos assigned to that Tag.
