A person poses with a cell phone in front of a computer screen to check Barack Obama's tweet on November 7, 2012 in Paris after his re-election as US president. Barack Obama brought his sophisticated social media campaign to an emotional climax, proclaiming his victory on Twitter and Facebook just as TV networks were breaking the news. The post was his most re-tweeted -- 472,000 shares in three hours -- according to Twitter's politics account @gov. It was also the most popular ever, topping a message from singer Justin Bieber, website BuzzFeed said. AFP PHOTO / LIONEL BONAVENTURE
Credit: LIONEL BONAVENTURE
An illustration shows US President Barack Obama's Twitter page on a laptop in Washington, DC on May 18, 2015. 'Hello, Twitter! It's Barack. Really! Six years in, they're finally giving me my own account.'With that inaugural Tweet sent from a smart phone the Oval Office before jumping on Marine One Monday, the President of the United States Barack Obama -- or @POTUS - cast off security and bureaucratic chains in place since he was elected. The account -- which already had nearly 150,000 followers in the first half hour -- will instantly become one of the world's top hacking targets, but it will also allow Obama to communicate directly for the first time. AFP PHOTO/MANDEL NGAN
Credit: MANDEL NGAN
The Twitter Inc. feed of David Cameron, U.K. prime minister and leader of the Conservative Party, is displayed on the screen of an Apple Inc. iPhone 6 in this arranged photograph taken in London, U.K., on Friday, May, 15, 2015. Facebook Inc. reached a deal with New York Times Co. and eight other media outlets to post stories directly to the social network's mobile news feeds, as publishers strive for new ways to expand their reach. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
An Apple Inc. iPhone 6 smartphone is held as a laptop screen shows the Twitter Inc. logo in this arranged photograph taken in London, U.K., on Friday, May, 15, 2015. Facebook Inc. reached a deal with New York Times Co. and eight other media outlets to post stories directly to the social network's mobile news feeds, as publishers strive for new ways to expand their reach. Photographer: Chris Ratcliffe/Bloomberg via Getty Images
Biz Stone, co-founder of Twitter, Inc., in an interview at CNBC's San Francicso bureau, on May 13, 2015 --
Former Arsenal player Ian Wright tweets about his food at a breakfast with bloggers at Tiong Bahru market during day 2 of the Barclays Asia Trophy Ticket Launch 2015 on May 13, 2015 in Singapore.
Credit: Charles Pertwee
A tweet released by Kensington Palace on twitter announces that Catherine, Duchess Of Cambridge has given birth to a baby girl, outside the Lindo Wing at St Mary's Hospital on May 2, 2015 in London, England.