QnA was originally designed to provide search engines – in particular, Live Search – with quality answers to people’s questions. The QnA team announced that immediately “Conversational” questions will be allowed on the site as long as you tag them with the word conversational.
What is a Conversational Question? To help you in understanding what a conversational question is we've divided the types of questions into two broad categories - Conversational and Informational.
In general, when you’re seeking social interaction and sharing, that’s Conversational. It’s important to note that Conversational is more than just “chat.” You can be looking to gain knowledge and information through a conversational question… the key difference is that you don’t need the information to help you make a decision or accomplish a task.
Conversational questions include: “Plain old curiosity, You’re taking the “pulse” of the community (just to see what people think), Political, religious, philosophical, and other debates, Sharing personal news, Jokes and other fun, Any question to or about another QnA member, and Speculation”.
More info: QnA Blog