经济学人:Facebook的第三幕(1)

The first big overhaul for Facebook came in 2012-14.Internet users were carrying out ever more tasks on smartphones rather than desktop or laptop computers.Mark Zuckerberg opted to follow them,concentrating on Facebook's mobile app ahead of its website,and buying up two fast-growing communication apps——WhatsApp and Instagram. It worked.Facebook increased its market valuation from around bn at the end of 2012 to—for a brief period in 2018—more than 0bn.The first big overhaul for Facebook came in