Facebook faces calls for greater transparency amid ‘fake news’ row

The social media company has angered advertisers after admitting it made errors in the way it measures ad activity

Facebook halts use of WhatsApp data for advertising in Europe

Social network’s decision comes as privacy watchdogs express serious concerns over its use of messaging app’s data

The Guardian view on social media: facts need to be labelled as facts

Editorial: Facebook in particular has to be wary of the dangers of misinformation. Otherwise social media will end up an echo chamber for post-truth politics

Facebook staff mount secret push to tackle fake news, reports say

Employees allegedly formed a task force to tackle the problem, while others say executives are reviewing products to eliminate appearance of political bias

Click and elect: how fake news helped Donald Trump win a real election

The ‘alt-right’ (aka the far right) ensnared the electorate using false stories on social media. But tech companies seem unwilling to admit there’s a problem• Become a Guardian supporter or make a contribution

Secret Facebook groups become Trump-era activist tools: ‘This is a wake-up call’

Those upset about the election of Donald Trump are using secret groups as a means to mobilize against what they fear could be a wild conservative agenda

Mark Zuckerberg vows more action to tackle fake news on Facebook

Facebook chief acknowledges problem but continues to argue that spread of hoax stories on the social network did not influence US election

Facebook’s fake news: Mark Zuckerberg rejects ‘crazy idea’ that it swayed voters

Those who think fake news is why someone voted for Trump show ‘profound lack of empathy’ and fail to internalize the president-elect’s message, he said

Facebook’s failure: did fake news and polarized politics get Trump elected?

The company is being accused of abdicating its responsibility to clamp down on fake news stories and counter the echo chamber that defined this election

Careful which chatbot you talk to, unless you want their ads on Facebook Messenger

Brands and businesses can send ‘sponsored messages’ to anyone who has previously chatted to them or a chatbot on Facebook Messenger

Mark Zuckerberg’s Facebook stake falls $3bn in a day

Social network’s shares plunge after chief financial officer warns of slowing advertising growth

Facebook’s profits soar as it continues to swallow online advertising market

Near tripling of the social media giant’s profits comes at a time when traditional news publishers are hemorrhaging ad dollars and announcing cutbacks

A bug in the matrix: virtual reality will change our lives. But will it also harm us?

Prejudice, harassment and hate speech have crept from the real world into the digital realm. For virtual reality to succeed, it will have to tackle this from the start