Various technologies are used to accurately measure waves in the ocean. In some places, knowing the impact that the waves are having on structures is critical to operations. For example, officials may close a coastal road after detecting overtopping waves or cancel maintenance on offshore wind facilities. This session assesses developments and applications in the field of wave monitoring and their practical use to support various operations. Participants help define how wave research and observation programs culminate in providing information for end-users. The following paper and extended abstracts relate to the use of wave measurements to cope with a range of issues from coastal erosion and climate change to marine spill response and flooding.