The For Review view contains messages that are caught by the spam conditions that most frequently catch real mail. For your convenience, we've automatically put them in one place, so you can review them, without seeing messages that are caught by our extremely accurate conditions. If we catch a lot of spam for your account, reviewing this list should be much quicker than reviewing any other view.
If you use our Standard settings, you won't ever see messages in this view. (Anything we recommend as a standard setting should catch no more than one legitimate piece of mail for every 500 pieces of spam it blocks.) Only our most aggressive conditions will catch messages that appear in this view.