The use of social networking sites continues to grow at the expense of email, according to a recent study from the Nielson Company.
The research found that US computer users spent 22.7 per cent of their online time at social networking sites and blog services in June.
The figure is up significantly from the same period in 2009, when social networking use accounted for 15.8 per cent of computer time.
Nielson found that the second most popular online activity is gaming, representing just over 10 per cent of time spent online, up from 9.3 per cent in 2009.
The uptake in social networking and blog use comes amid a drop in the use of older online communication methods, most notably email. The study recorded a 28 per cent fall in time spent on email, down to 8.3 per cent.
Use of instant messaging platforms and portal services also fell, recording 15 and 19 per cent drops respectively.
Highlighting the huge popularity of social sites, Twitter announced yesterday that its users had posted more than 20 billion tweets since the service began four years ago.
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The new policy is aimed at making the social network a safer place