Facebook is looking more than ever like the mobile company CEO Mark Zuckerberg declared it had become last year. The social network's mobile business rose to 30% of its advertising sales in the first quarter from almost nothing a year ago.
Why Facebook is focusing so keenly on mobile is no mystery. Facebook said its number of monthly active mobile users hit 751 million as of the end of March, up 54% from a year ago, and up 10% from 680 million in the fourth quarter. Monthly active users on Facebook overall reached 1.1 billion, up 23% from a year ago, while daily active users rose 26% to 665 million in the quarter.
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