In his 2015 bookGamechangers, innovation expert Peter Fisk provides 100 case studies of businesses that have won the game, changed the game or even invented their own games via new strategies and innovations – from global giants to small start-ups. So what makes a game changer?

Facebook group Wavey Garms is a place for ‘cool’ people to sell their second-hand designer clothing – but not everyone gets accepted. With over 1,000 membership requests every week, what’s drawing the numbers?

“#ClapbackSeason!” announces a post from Instagram account ShadeRoom. “#ChrisBrown babymomma #Nia had enough with y'all!” This might not mean much to you, but if you’re following the pop star’s love triangle on the app’s biggest gossip account, it’s invaluable information.

Is Instagram becoming the new shopping centre? It seems so, since one of the biggest names in fashion publishing –Vogue– is making its Instagram feed 'shoppable'. But canVoguetranslate its 1.9 million followers and reputation as a taste-maker into significant sales?