A "Clicker" is a handheld device used primarily in educational settings to facilitate interactive learning. It allows students to respond to questions posed by a teacher in real-time, providing immediate feedback on understanding and engagement. Each student has their own clicker, which sends responses to a central system that collects and displays the results. Clickers are often used in conjunction with PowerPoint presentations or learning management systems to enhance classroom participation. They can be utilized for quizzes, polls, and surveys, making it easier for educators to gauge student comprehension and adjust their teaching methods accordingly.