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There are several questions (like this one) that say community wiki. Also there are random answers that say community wiki even though the questions they answer don't (like this one).

What does community wiki mean?

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  • \$\begingroup\$ There are a lot of CW question on meta, but many of them are no longer relevant - ever since CW became a mod-only feature - or somewhat localized and unclear. Hopefully this question can clear things up for new users. \$\endgroup\$
    – LeguRi
    Commented Dec 22, 2010 at 4:00
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    \$\begingroup\$ It used to be a user option on questions. See meta.rpg.stackexchange.com/questions/630/… \$\endgroup\$
    – yhw42
    Commented Dec 22, 2010 at 18:16

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Basically, they are posts that are owned by the community with a much lower reputation threshold for editing. They are sometimes used when the poster wants others to collaborate and add to their answer and improve it, such as this one.

From the faq (on http://meta.stackoverflow.com):

  • Community Wiki posts are owned by the Community User, not by any individual user.
  • A much lower reputation (100 instead of 2000) is needed to edit a community wiki post.
  • Voting on a community wiki post (up or down) does not affect any user's reputation.
  • The original author still gets badges based on community posts.
  • The original author keeps the reputation gained (or lost) before their post entered community mode.

A post (question or answer) becomes community wiki if one of the following is true:

  • It has more than 30 answers.
  • The owner has edited the post 10 times (tag edits don't count).
  • 5 different users have edited it (again, tag edits don't count).
  • It's flagged for moderator attention and a moderator enables the community wiki mode (typically done only by request).

An answer is made community wiki:

  • if the owner check the box when creating or editing it.
  • if it is posted to a question that is already community wiki.

You can find all posts that are community wiki by using the Advanced Ninja Search Option wiki:1.

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