Web Bluetooth is a technology that allows web applications to communicate with nearby Bluetooth devices directly from a web browser. This enables users to connect to devices like fitness trackers, smart home gadgets, and other Bluetooth-enabled hardware without needing to install additional software or apps. With Web Bluetooth, developers can create interactive web experiences that utilize data from connected devices. For example, a website could display real-time information from a heart rate monitor or control a smart light bulb. This technology enhances user engagement by making it easier to integrate physical devices with web applications.