This video introduces students to the Sensor Networks and Data Analysis course. It discusses, at a high level, what a sensor network is, and various applications across the disciplines, from underwater sensing, to structural health monitoring, and remote sensing. The topic highlights the importance of understanding how signals are created by each sensor modality, the need for reliable network communications, and the need for machine learning at the decision making stage. The topic finishes by giving the key aims of the course, and looking forward to what the rest of the course will offer.