Check the post link below for more details and some screen shots
Friends are often the best source of advice when you're trying new things: Where should I go to dinner? How do I go buy a car? What new music should I check out? Friends know your tastes, and you have confidence in their opinions.
Like many of our products, Questions originated as people began using Facebook in a new and unexpected way. People would update their status with a question, and their friends would answer in the comments. We saw this and began thinking about how we could make this interaction more useful. Over the summer, we began testing Questions with a small group of people, and today we are beginning to roll it out to everyone.
FYI from the Facebook Questions Help Center page: