In contrast, during the first three quarters of 2009, Google's sales increased by only 5 per cent due to the decline in 'click' traffic paid-clicks.
Google's sales revenue increased in the last three months of 2009 due to strong earnings achieved through advertisements.
Advertisers reportedly paid 5 per cent more per click on ads found in Google's search engine in the 4th quarter of 2009 compared to the previous year.
For the fiscal year of 2009, Google earned a total of $23.7bn in revenue, of which advertising accounted for 97 per cent. Net profit for the period was $6.52bn, up 54 per cent.
Google's Q4 results exceed expectations but the company share still slid 5 per cent in after-hours trading.