Digital technologies mediate how we interact and communicate. We have access to multiple interfaces that help us navigate our networks, and a myriad sources of information fan out at the touch of a finger. The mobile web allows us to stay online, and tuned in, regardless of location and time. We can now read, write, filter, and diffuse content as we go through our daily activities. And with every step we take online, we reinforce the ties that make our opinions and actions interdependent –with consequences that we are still trying to understand but that hold the key to explain some of the most intriguing social phenomena of our time: from the sudden emergence of massive protests and political movements, to the swift diffusion of information and tidal opinion change. At the DiMeNet group we aim to advance our theoretical understanding of these phenomena, and analyze how we interact, communicate, and organize by reconstructing the behavioral traces we leave online. To do so, we apply the insights and tools developed in the fields of network science, data mining, and computational sociology –knowing that digital media has changed not just how we communicate, but also how we can conduct research.