Tags allow you to add searchable text to a media item. They can be used to help classify content and are useful for categorization not covered by filters. Think of it like a Post-it Note.
View tags for any media underneath the player.
To add a tag:
Click in the Enter New Tag field underneath the media.
Type in your tag.
Hit return.
You can remove a tag at any point by clicking the the X next to the tag term. This will remove the tag for all users.