Twitter is fastest growing social network

London: Almost half a billion people across the globe have signed up for Twitter, making it the fastest-growing social network in the world. Of all Internet users worldwide, 36 per cent, an estimated 485 million, have a Twitter account. According to the internet research company Global Web Index (GWI), the number of account holders who use the microblogging site at least once a month grew 40 per cent in the second half of 2012 to 288 million, the Telegraph reports. This figure means Twitter is growing faster than both Facebook and Google+, the report added. According to the report, in the same period Facebook grew 33.4 per cent to 693.5 million. Google+ grew 27.7 per cent to 343 million active monthly users. ANI