In February this year Facebook celebrated its 20th birthday. Tom Wainwright, tech and media editor of The Economist has written a brilliant cover story on the company's evolution since it began in a dorm room at Harvard. With a market capitalisation of $1.2trn and 3bn users, Facebook operates in a new social media order. Tom writes that "public posting is increasingly migrating to closed groups, rather like email. What Mr Zuckerberg calls the digital “town square” is being rebuilt—and posing problems." How is the outfit grappling with these changes? Over the years it has mastered the art (and science by relying on data) of cloning features and sometimes copying competition while managing to stay relevant. What does the future hold for the behemoth? How is Artificial Intelligence changing the industry? Tom covers a lot of ground in the podcast.