On my CR profile, I have seen a number of tags related to questions I have asked. When I hover over these tags, it says "asked non-wiki questions." What is it?
This is a wiki question. 10 edits by the author or edits from 5 different users can turn a question into a wiki question. Only a ♦ moderator can manually turn a question into a wiki. That helps in more people getting interested in making the question better. If it is community wiki, then nobody receives rep and everyone starts contributing without hesitation of someone getting the rep for all their hard work.
Anything which has a particular user associated with it is non-wiki.
For more information, see the Meta Stack Overflow post.