Microteaching involves teaching a small unit of content to a small group of students for a short period of time, usually 10-15 minutes. It is used to train student teachers and improve experienced teachers' skills. The key characteristics of microteaching are reducing complexity by decreasing class size, lesson duration, and content to focus on one teaching skill at a time. The microteaching process involves planning, teaching, receiving feedback, re-planning, and re-teaching to another group. Its main benefits are allowing student teachers to develop skills through practice in a safe environment with immediate feedback. However, some argue it is time-consuming and may not fully prepare teachers for real classrooms.