What are the quizzes about?

United States
January 13, 2010 12:22pm CST
I haven't logged in for quite awhile here and now I see a box that says quizzes? I can't find any place that explains them so can someone tell me what they are about? Do we earn anything from them? Do you do them often? I'm really out of touch here. Thanks in advance for any info you can give me.
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