First quarter results released by Google reveal its mobile ad prices are stabilising - after a sharp decline at the end of last year.
Prices are still decreasing, but only by four per cent - in the final quarter of last year, prices fell by 12 per cent.
The figures show PPC marketing professionals are beginning to pay more for mobile ads - which have generally made less money than ads designed for desktop computers or laptops.
After the results were released yesterday, Google's stock jumped to $770 in extended trading - an increase of $4.09.
Google is one of the world's biggest companies, with a market value of more than $250bn. In terms of technology companies, only Apple Inc has a higher value.
Google's revenue increased from last year to $14 billion - a 31 per cent rise. After advertising commissions have been subtracted, Google can still boast $11 billion in revenue.
As well as offering the Internet's biggest advertising network, Google dominates the mobile and desktop search market.
Its Android operating system is the world's most widely used platform for smartphones - and Google also produces its own mobile devices, starting with the Nexus One smartphone in January 2010. The latest products are the Nexus 10 tablet and Nexus 4 smartphone, both of which were released in November 2012
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