The Sievert (Sv) is a unit of measurement used to quantify the biological effects of ionizing radiation on human health. It helps assess the potential risk of radiation exposure by considering both the amount of radiation absorbed and its impact on different types of tissues. One Sievert represents a significant dose of radiation that can lead to health effects, such as radiation sickness or increased cancer risk. The unit is essential in fields like radiology, nuclear medicine, and radiation protection, where understanding radiation exposure is crucial for safety and health management.