Bing Again is a search engine, displays Bing search results according to popularity for that query on Facebook, or we can say as most number of Facebook likes for that query. Unique feature of Bing Again is, search results for web, images , videos, news appears in a single page.
Bing Again describes its site as a flavor of both Bing and Facebook, as it fetches results from Bing and then display results on “Bing Again” according their popularity on Facebook.