A Tag is a descriptive label that you create, then apply to your pictures/videos so they're easy to organize and find. View all the pictures with the same Tag by clicking the Tag in the navigation pane. To check a picture's Tag, roll over the picture with your mouse.
Create a Tag
1. In the navigation
pane, right-click 
Tags and select Add
Tag.
2. Enter a descriptive name for the new Tag, then press Enter.
Click here to learn about removing Tags.
Add the Tag to your pictures
Note: Tags are saved in the file properties so they appear with the picture in any application that checks the properties (for example, Microsoft Windows Photo Gallery, in the Windows Vista operating system).
Other ways to add Tags
You can also add Tags and nested Tags in the picture properties window and in the full screen, single picture view. See Add Tags in Properties Window and Single Picture - Full Screen.
See also