Internet of Things (IoT) is the network of physical objects embedded with sensors, software and network connectivity that enables them to collect and exchange data. IoT devices use technologies like RFID, WiFi, barcodes, QR codes and sensors to connect physical objects to applications and the internet. Some key applications of IoT include smart homes, agriculture, energy management, transport and logistics, and smart lighting. While innovative technologies are still needed to fully realize IoT's potential, its main objective is to make everyday physical devices and objects smarter through connectivity and data sharing.