By Don Reisinger The app shows users Bing homepage images as soon as the lock screen loads, and also lets them search Bing without having to unlock the device.
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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/42ffb192/sc/15/l/0L0Scnet0N0Cnews0Cmicrosofts0Epicturesque0Elock0Escreen0Eputs0Ebing0Efront0Eand0Ecenter0Eon0Eandroid0C0Tftag0FCAD590Aa51e/story01.htm