Google's total share of the search market has grown to nearly two-thirds of all US search traffic, according to the latest figures.

Research firm comScore said in its monthly report that Google's total search share grew from 61.9 per cent to 63 per cent in August.

Google's sites handled some 7.4 billion of the 11.7 billion searches performed in the US over the month.

Most of Google's gain came at the expense of rivals Yahoo and Microsoft. Yahoo saw its share fall by 0.9 per cent over August to just 19.6 per cent of the total market with 2.3 billion searches.

Microsoft was a distant third, seeing a 0.6 per cent decrease to 8.3 per cent of the market at 977 million searches.

Ask Network's share increased slightly to 4.8 per cent over 4.5 per cent in July. Fifth-placed AOL also saw a slight gain, improving from 4.2 per cent to 4.3 per cent of the US search market.