Quality circles are voluntary groups composed of employees who meet regularly to identify, analyze, and develop solutions to work-related problems. They are designed to improve organizational performance and motivate employees. Quality circles utilize techniques like brainstorming, flowcharts, checksheets, and cause-and-effect diagrams to systematically identify issues, analyze root causes, and develop solutions. When implemented effectively with management support, quality circles can result in benefits like improved employee engagement, problem-solving skills, communication, quality, productivity, and workplace morale.