A "clicker" is a handheld device used to register responses, often in educational or training settings. It allows participants to answer questions or provide feedback by pressing buttons, which sends their responses to a central system. This technology is commonly used in classrooms, conferences, and workshops to engage audiences and gather real-time data. Clickers can enhance learning by promoting interaction and participation. They are often used in conjunction with presentations or lectures, allowing instructors to assess understanding and adjust their teaching accordingly. This tool is also known as a student response system or audience response system.