What is Ubuntu?,
who is Napoleon?,
what is a pony?, etc, are questions that can be answered on various online places, websites that feature a question-answers attitude.
Unity Answers lens harnesses the "artificial intelligence" of numerous websites, in order to create a Dash place where typing questions is properly met (both informative and entertaining) by answers.
Basically, typing a question in the Dash home's search area (such as
What is Ubuntu?), displays (as a matched result) short yet effective definitions.