Bing and AOL announced a long term partnership back in July of 2015 and now, as of Jan 1st, 2016, Bing has taken over AOL search – successfully powering all of AOL’s search results.
As of Jan. 1, Bing powers AOL’s web, mobile, and tablet search, providing paid search ads and algorithmic organic search results to AOL’s properties worldwide. All major Bing Ads ad products are enabled for AOL search traffic worldwide to provide marketers with additional high-quality volume and ways to reach their desired audience.
Over-all this gives Bing quiet the boost in marketshare considering the fact that Bing provides search results for the 3rd and 5th largest search engines – Yahoo and AOL. That means Bing powers roughly 1/3 of all United States based, pc web searches.