INTERNATIONAL NEWS - Facebook has said users are spending less time on the site following changes to the way it prioritises content.
The social network reported better than expected results despite the changes, which come amid increasing scrutiny of its ad business, role in political campaigns and broader social impact.
Chief executive Mark Zuckerberg said the tweaks would help Facebook in the long-term.
He called 2017 a strong year but "also a hard one".
Facebook's revenue soared 47% last year to more than $40bn (£28.2bn), while profits jumped 56% to nearly $16bn.
The gains came despite an unexpected $2.3bn tax payment due to the new US tax law, which included a one-off tax on overseas profits.
But Mr Zuckerberg said the firm takes "very seriously" ongoing debate about the utility of social media sites and wants to ensure time spent on the network is "more meaningful".