The Social Media Week London 2015 was a five-day conference focused on social media marketing and technology, featuring a variety of events such as keynotes, panels, and workshops held in Westminster from September 14-18, 2015. The conference included talks on topics like social media's impact on mental health and the evolution of influencers, showcasing notable speakers from Ogilvy and related fields. The activation report highlights Ogilvy's extensive engagement through various content strategies and significant social media performance, achieving a 16.1% growth in social impressions and increased visitor engagement.