Further information: https://berlinbuzzwords.de/17/session/graph-theory-looking-communities Community detection in social networks enables to identify densely connected groups of individuals, as well as to dynamically characterise their behavior. This highly innovative field brings new business opportunities for fraud detection, digital marketing and HR analytics. After an introduction to Graph Theory and community detection algorithms, we will present two scenarios where these concepts are applied to social networks data: Meetup and LinkedIn. Will our algorithms manage to identify Data Science communities ? Speaker: Aurélia Nègre & Alberto Guggiola