Explanation
Text Description automatically generated with low confidence

Box 1: 1
A priority defines whether a deployment should be applied to a targeted device relative to other deployments.
A deployment priority is a positive integer, with larger numbers denoting higher priority. If an IoT Edge device is targeted by more than one deployment, the deployment with the highest priority applies.
Deployments with lower priorities are not applied, nor are they merged. If a device is targeted with two or more deployments with equal priority, the most recently created deployment (determined by the creation timestamp) applies.
Box 2: "properties.tags": {
You create a deployment manifest and then define which devices it applies to based on tags in the device twin.
Reference:
https://docs.microsoft.com/en-us/azure/iot-edge/module-deployment-monitoring