Facebook's biggest challenge and its greatest opportunity now lies in mobile devices. Most Facebook users access it using a mobile phone or tablet computer, but the company only started showing mobile ads about 9 months ago.
Facebook said it generated 23%, or $306 million, of advertising revenue from mobile, up from 14% in the third quarter.
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The US president welcomed King Abdullah II of Jordan for a working visit.
The former US first lady received a standing ovation after delivering a University of Oxford Romanes Lecture at the city’s Sheldonian Theatr
The Duke and Duchess of Sussex are to visit the city in July.