Debris disks provide us with a long-lived record of planet formation in extrasolar planetary systems. They inform us about the presence of minor body populations and massive perturbers around other stars, collisional processes among the debris particles, effects of stellar radiation on them. Modern high-resolution observations of debris disks in different wave bands give us not only spectral information on these disks but also highlight details of their spatial structure including those produced by gravitational effects of embedded planets. The goal of this session is to bring together expertise of observers, modelers and theorists and to discuss our current understanding of the debris disk properties and evolution.