What are they?
Wikis are webpages where many people can contribute and edit content. Be aware that content may not be from reliable authors/organizations/publishers. The wiki site manager may periodically check for inaccuracies in the added content, but there is no guarantee. Authorship is more difficult to determine on wikis since there are many contributors.
How should they be evaluated?
Take a few minutes to browse the wiki site below.
Things to consider:
If answering yes to these considerations, then chances are the wiki is a source of credible information. If answering no, then you may want to consider an alternate source of information.