There are billions of people increasingly glued to 'smartphones' and consumed by the seemingly endless spectacle of 'social media.' But why? Reporter Hilary Andersson seeks to answer this question by tracking down insiders who reveal how social-media companies have deliberately developed habit-forming technology to get people addicted. Former Facebook manager, Sandy Parakilas, tells us the "goal is to addict you and then sell your time." Likewise, Leah Pearlman, the co-creator of the renowned 'Like' button, warns of the dangers of social-media addiction. Through these voices, and many others, Andersson shows how behavioural science is profoundly used by tech companies to keep people endlessly checking their phones, to the end of huge profits.