Bing is a web search engine created by Microsoft that replaces Live Search. Unveiled by Microsoft CEO Steve Ballmer on May 28,2009, at the All Things D conference in San Diego, Bing is a rebranded version of Live Search, and will go live worldwide by June 3 2009.

Notable improvements in general searches include the addition of related searches (called "Explorer pane" on the left side of search results) based on semantic technology from PowerSet, a search company Microsoft purchased in 2008, search suggestions as you type, and the ability to keep track of your search history.