Device shadowing or digital twins is a technique to create a replica or digital model of applications, systems, and processes in IoT. It represents how different elements in the IoT operates. In Digital Twin, developers can create a backup of the running applications and devices in the cloud to make the whole IoT system highly available for faults and failure events. With this technique, they can access these applications and device statistics even when the system is offline. Organizations can also easily set up the virtual servers, launch a database, and create applications and software to help run their IoT solution.