Majority of Online Searchers Use Multiple Search Engines, Pointing to a Fluid Competitive Landscape, According to Nielsen//NetRatings. Nielsen//NetRatings MegaView Search Service Releases Latest Online Search Engine Share: Google Secures 47 Percent of All Searches; Yahoo! Garners 21 Percent; MSN Captures 13 Percent. Nielsen//NetRatings, the global standard for Internet audience measurement and analysis, reported that a minority of searchers exclusively use only one of the top three search engines-Google Search, Yahoo! Search and MSN Search. According to the latest custom research from Nielsen//NetRatings MegaView Search, 58 percent of Google searchers also visited at least one of the other top two search engines, MSN Search and Yahoo! Search, showing that even though Google’s market share is dominant today it continue to have competition …..