A unique article-making web site where it has anything. You can make articles, anyone can make articles, talk about the articles you, your friend, or a total stranger, has posted. The disadvantage of anyone can edit/make articles is that anyone can post anything that isn't true. However, Wiki's, or how it's abbreviated, users can report an article to a moderator
and they will restore the text ASAP
or close to the text. Wikipedia is often not trusted on by schools because of that simple disadvantage.