Post-market surveillance refers to the ongoing monitoring of a product, typically a medical device or pharmaceutical, after it has been released onto the market. The purpose of post-market surveillance is to track and evaluate the safety and effectiveness of the product in real-world use, identify any potential safety concerns or adverse effects, and ensure that regulatory requirements are being met. This process involves collecting and analyzing data from various sources, including reports of adverse events, complaints from users, and clinical studies. Post-market surveillance helps to identify and address any issues with the product, ultimately ensuring the safety and well-being of patients and consumers.