Questions relating to how tag wikis and tag wiki excerpts should be written and used.
For discussion on what constitutes a good Tag Wiki, please see this related meta discussion.
The tag wiki excerpt is a brief plain text introduction to the topic that the tag represents. It is shown at the top of tag question lists, and as a tooltip wherever the tag appears.
The full tag wiki is a detailed introduction to the topic, suitable as a destination for those curious about it.
For more information, Jeff Atwood has written a blog about our tag pages that is relevant.