What type of information do device twin tags contain?

Device twin tags are part of the Azure IoT solution that provides the ability to store metadata about a device. The tags within a device twin are designed to hold information that is associated with the device's identity, such as connectivity specifics and location details. This metadata is useful for managing devices, grouping them, and applying configurations without requiring a device to be online.

For example, tags may include information like the geographical location of the device or connectivity information that can assist in managing the IoT deployment efficiently. This is particularly beneficial when working with many devices, allowing for quick access to relevant context about each device, facilitating operations like remote monitoring and management.

Other options do not accurately reflect the purpose of device twin tags. Tags are not meant for real-time telemetry data, which is typically sent through the methods defined for telemetry, nor do they store firmware versions or details only the device itself can access. Thus, the correct answer highlights the role of device twin tags in providing important connectivity and location-specific details that aid in efficient device management within an Azure IoT solution.