Bing's statement about its involvement in the service says "when people want to search beyond Facebook, they see web search results from Bing with social context and additional information such as Facebook pages".

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Lured to marketing for Bing, she devised social media strategies and launched REDU, a Webby-winning campaign site for education reform.

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The two companies have worked together before on integrating social search into Bing.

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The final list included planned, strategic social media campaigns, like Bing's partnership with the Facebook game Farmville to lure players to the search engine with a Farmville money reward.

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Do they use Google or Bing for search, Facebook on their mobiles or some other social network?

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Now when you do a web search on Facebook, the new search results page features a two-column layout with Bing-powered web results appearing on the left-hand side overlaid with social information from Facebook including how many people like a given result.

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Bing has been slowly increasing its share of American searches and is working with Facebook on integrating social-networking data into its results in a bid to improve them. (This is another reason why Google wants its own source of social data.) People are also being offered more and more digital information via other sources, including specialised search engines and software applications on smartphones.

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