A Delphi study is a structured communication technique used to gather expert opinions and reach a consensus on a specific topic. It typically involves multiple rounds of questionnaires sent to a panel of experts, who provide their insights anonymously. After each round, a facilitator summarizes the responses and shares them with the group, allowing participants to reconsider their views based on the feedback. This iterative process continues until a consensus is achieved or diminishing returns are observed. Delphi studies are commonly used in fields like healthcare, education, and technology to forecast trends, assess risks, or develop guidelines based on expert knowledge.