Microsoft's Bing has recorded its biggest ever month-on-month increase in US market share, new comScore data reveals.
According to comScore, Bing jumped to 13.1 per cent in January, up from 12 per cent in December 2010.
Bing's rise comes at the expense of market leader Google, which registered a 1 per cent drop in its market share to finish at 65.6 per cent.
Microsoft's Bing continues to forge ahead in the search market thanks to a series of marketing campaigns, newly added features, a fresh layout and its search deal with Yahoo, which sees Bing powering Yahoo searches for the next 10 years.
Yahoo accounted for 16.1 per cent of all US searches made in January this year.
Google continues to dominate the market, but a one per cent drop in its market share in a month may sound alarm bells within the company as it goes through a transitivity period at the top, with co-founder Larry Page set to replace Eric Schmidt at CEO later this year.