A wearable device is an electronic gadget designed to be worn on the body, such as a smartwatch, fitness tracker, or smart glasses. These devices often collect and transmit data related to health, physical activity, or even neural signals, providing users with real-time feedback and insights. Wearable devices connect to other systems or the internet, enabling features like notifications, health monitoring, and integration with mobile apps. Their growing popularity raises important considerations for data privacy and cybersecurity.