A complaint is an expression of dissatisfaction or annoyance about something. It can be made verbally or in writing and often involves a specific issue, such as poor service, defective products, or unmet expectations. Complaints are common in various settings, including customer service, workplaces, and personal relationships. Complaints serve several purposes, such as bringing attention to problems and prompting solutions. They can help organizations improve their services or products by identifying areas that need change. Additionally, addressing complaints can enhance customer satisfaction and build trust between businesses and their clients.