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Twitter valuation.File photo dated 19/08/2009 of the Twitter icon displayed on a laptop. Issue date: Friday September 25, 2009. Micro-blogging sensation Twitter is to secure a cash injection from investors valuing the business at one billion dollars, it was reported today. The popular online messaging site is thought to have lined up 100 million US dollars (£62 million) in financing, according to the Financial Times. See PA story CITY Twitter. Photo credit should read: Martin Keene/PA Wire URN:7853385 (Press Association via AP Images)
Twitter valuation.File photo dated 19/08/2009 of the Twitter icon displayed on a laptop. Issue date: Friday September 25, 2009. Micro-blogging sensation Twitter is to secure a cash injection from investors valuing the business at one billion dollars, it was reported today. The popular online messaging site is thought to have lined up 100 million US dollars (£62 million) in financing, according to the Financial Times. See PA story CITY Twitter. Photo credit should read: Martin Keene/PA Wire URN:7853385 (Press Association via AP Images)

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    Despite falling user growth, Twitter's power is growing

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Despite falling user growth, Twitter's power is growing

While Wall Street has been unhappy with Twitter, the social media network still has an important and global reach. CNN's Clare Sebastian reports.

Despite falling user growth, Twitter's power is growing

While Wall Street has been unhappy with Twitter, the social media network still has an important and global reach. CNN's Clare Sebastian reports.