Clinical monitoring is a critical step in the drug development process that involves tracking the safety and effectiveness of investigational drugs or medical devices in clinical trials. It is essential to ensure patient safety and treatment efficacy by identifying adverse events and making sure that the trial is conducted in compliance with the study protocol, applicable regulatory requirements, and ethical principles. Effective clinical monitoring strategies include site selection and training, monitoring plans, data management, safety reporting, communication and collaboration, and risk management. Continuous monitoring, review, and adjustment are necessary to ensure the study is conducted successfully and bring safe and effective treatments to patients.