Author told woman on Twitter it would be immoral not to abort pregnancy if she knew baby had Down's syndrome
The open-source social network struggles to stop Isis accounts spreading propaganda after the murder of photojournalist James Foley. By Samuel Gibbs
By acting on footage of James Foley's murder, Twitter has taken responsibility in a way it hasn't over abuse and threats. So what happens next?
Lynx, McDonald’s and Southampton FC are all testing the marketing potential of self-destructing photo app
Reaction to the untimely death of Robin Williams underlines the role social media now plays in the expression of public mourning
Met says passing on clip of Isis militant murdering US journalist on social media could lead to prosecution under anti-terror laws
Twitter’s video sharing service has expanded the options to users, letting them upload from the camera roll for the first time.
In the wake of the journalist’s death, social media companies begin to take an editorial approach to the content they are hosting. By Hannah Jane Parkinson
Greggs’ proactive and humorous response to its logo mishap is a lesson in crisis management all retailers should follow
Company updates support page to say that it may add content from all sorts of sources on Twitter - but changes are unpopular. By Charles Arthur
Dean Burnett: Yet another look at what great moments in science would have looked like if they happened via Twitter
An alternative logo cropped up when you searched for Greggs on Tuesday. But why does this happen?
Hundreds of users complain as favourited tweets suddenly appear in their followers’ timelines like retweets. By Samuel Gibbs
PwC study suggests third of young people would be happy for employer to see social media profiles in return for job security
Premier League warns fans that posting goal vines is illegal, as is sharing them on websites such as Twitter