An IoT Protocol is a set of rules that allows devices in the Internet of Things to communicate with each other. These protocols ensure that data is transmitted efficiently and securely between devices, such as sensors, smart appliances, and mobile applications. Common IoT protocols include MQTT, CoAP, and HTTP, each designed for specific use cases and network conditions. These protocols help manage how devices connect, share data, and respond to commands. By standardizing communication, IoT protocols enable seamless integration of various devices, making it easier for users to control and monitor their smart environments, such as homes and cities.