Randi Zuckerberg warns of social media’s risks in two new books
Facebook founder Mark Zuckerberg's sister suggests adults and children should limit time online
Katy Perry roars past Justin Bieber to become most popular Twitter user
Star passes 46.5m followers on social network, with musicians accounting for four of the five most-followed accounts on Twitter. By Stuart Dredge
Children and the internet: a parent’s guide
Jamie Oliver has banned his children from social media – and in many families there is a constant battle between demands for privacy and safety. Here, parents share the lessons they have learned. By Viv Groskop
Twitter flotation: the next Google, or another Groupon?
This week's IPO is eagerly awaited, but Twitter must win the battle with those investors who think it is doomed to remain a 'niche' site, writes Juliette Garside
Foxhunting season expected to attract hundreds of first-timers
Facebook used to recruit novices, with rural alliance estimating number of hunters up a quarter since ban on hunting with dogs
One Direction top chart of influential UK Twitter users
Boy band take top five places, with Ed Sheeran, David Cameron, Piers Morgan, Caitlin Moran and Ricky Gervais also in top 10. By Stuart Dredge
BlackBerry: is this RIP for BBM?
The Canadian phone remains a popular budget option. But the shiny, happy people holding handsets have all moved on
BlackBerry BBM gains 20m new users from first week on iPhone and Android
Messaging service now has more than 80m monthly active users, with 60m on BlackBerry smartphones, but brings barriers down on rival smartphones
How storytelling has made social networking interesting again
Wattpad caters to a community of millions and is all about getting writers and their stories – and readers – online, writes James Bridle
Facebook trials warning messages on violent, sexual and sensitive content
Move follows comments by PM calling site 'irresponsible' for posting 'beheading videos, especially without warning'
Kabam talks free-to-play, King IPO and what mobile games can learn from Game of Thrones
'I think the gaming industry will start to look a little bit more like the television industry,' says games publisher's CEO Kevin Chou
Mark Zuckerberg’s sister Randi wants kids to go offline
Randi Zuckerberg has written a children's book extolling the virtues of the real world over social networks such as Facebook. What will her brother think?
Hot Cherry appoints Chris Seth as director
Ex-general manager of networking site Stardoll joins social media agency in a non-executive role. By Mark Sweney
Facebook launches first video ads within its mobile apps
Feature is restricted for now to ads for other apps, giving developers a new way to show their apps off in the mobile news feed, but they won't auto-play. By Stuart Dredge
Are teenagers really careless about online privacy?
As Facebook lifts its sharing restrictions on 13-to-17-year-olds, Jon Henley finds that young people know exactly what to do with their privacy settings – especially where Mum is concerned