AWS IoT Core is a cloud service provided by Amazon Web Services that enables secure communication between Internet of Things (IoT) devices and the cloud. It allows devices to connect, manage, and interact with each other and applications, facilitating data collection and analysis. With AWS IoT Core, developers can easily build and deploy IoT applications without worrying about the underlying infrastructure. The service supports various protocols, ensuring compatibility with a wide range of devices. It also offers features like device management, data processing, and integration with other AWS services for enhanced functionality.