The 'nice pic, Phwoar!' moment
This week, BBCtrending radio re-tells the stories of how McDonalds, Ryanair and others engaged with the public - and sometimes fell flat. Anne-Marie Tomchak meets the head of communications for Ryanair, whose CEO tweeted 'nice pic, Phwoar' during a real social media engagement session.
So what are the secrets of looking good on social media? And how do you cope when the whole world suddenly targets you on-line, for example for having the same name as a celebrity.
Featuring Esra Dogramaci, BBC digital media consultant, in the studio.
Join the conversation on Twitter #BBCTrending