I was browsing the tags and noticed several questions tagged with untagged.
This tag isn't very useful. Should we kill it and replace it with useful tags?
(just wanted to make sure before I went on a retagging rampage :)
Untagged is automatically added when the last tag on a question is removed. Typically this happens automatically when the system goes and removes tags that have 1 or fewer questions. Unfortunately this sometimes leaves questions without tags, and thus they are marked with untagged.
If you see this tag please add appropriate tags to the question so that it does not persist.