Facebook launched a service that is very similar to “Yahoo Answers”, a place where users can ask questions that can be answered by the entire Facebook community. It’s usual to see users posting questions on their wall, so Facebook has created a “special” space where people can ask questions they want and have an entire community of Facebook users to respond.
The new feature is in beta since July and has gradually been extended to more and more users. Questions can also be performed as surveys, where you ask a question and then leave a number of options for people to vote for the best answer or their opinion. Also, you can follow questions that grab your attention and receive notifications every time someone suggests an answer to that question.
One thing to keep in mind is that Facebook Questions has no privacy settings, all questions are public and visible to anyone on the Internet. So all Facebook users will see your question and answers.