For questions related to the special tag "untagged", which is reserved for use by the system (to identify posts with no valid tags).
For questions related to the special tag "untagged", which is reserved for use by the system (to identify posts with no valid tags).
- One situation when such tag may be added to a question is as a result of migration. See also: Migrated SO question get an untagged tag.
- This can also happen as a result of pruning single-occurrence tags, see: What causes a question to be tagged as [untagged]?
- Some further links related to this tag can be found also in this discussion: Do not allow users to tag questions with “untagged”.
