What does it mean for cabin baggage to be "tagged" at check-in?

Tagging cabin baggage at check-in is an important security measure that helps ensure the safety and compliance of items brought onboard an aircraft. When baggage is tagged, it signifies that the item has been examined and authorized by the airline staff as acceptable for cabin use. This process involves verifying that the baggage meets the airline’s size and weight restrictions, along with checking for any prohibited items within the luggage.

The tagging acts as a visual indicator and a means of tracking the baggage throughout the journey. It confirms that the item has passed the security checks and is cleared for the cabin, providing assurance to both the airline and the passenger.

Other options either misrepresent the process or pertain to different aspects of baggage handling. For example, the characterization of baggage as "too heavy" or the necessity to check it at the gate does not align with the purpose of tagging at check-in, which is specific to the authorization and identification of cabin baggage. Similarly, while it is important for baggage to contain no prohibited items, tagging itself is about the approval process rather than a definitive statement about the contents.