Product quality control is a crucial aspect of manufacturing and service industries, aimed at ensuring that products meet established standards of quality and performance. This process involves systematic monitoring, testing, and evaluation of products at various stages of production and distribution to identify defects, maintain consistency, and enhance customer satisfaction. The implementation of quality control measures not only reduces waste and rework but also fosters continuous improvement within organizations. Advanced technologies such as automation, data analytics, and artificial intelligence are increasingly being integrated into quality control processes to enhance accuracy and efficiency. This paper explores the principles of product quality control, the methodologies employed in different industries, the role of technology in modern practices, and the impact on overall business performance.