Microsoft Bing (before called "Windows Live Search" and "MSN Search") is a search engine. Microsoft calls it a "decision engine", meaning that Bing tries to interpret search queries and give people better search results compared to a typical search engine, helping the user make better decisions. Bing concentrates on four major areas: shopping, travel, local and health. A preview version was made available for everyone to use on June 1, 2009, and the website was fully launched on June 3, 2009. The website quickly became popular after a few weeks.