The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.
The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.
Data refers to facts and statistics collected together for reference or analysis. In the building context, data produced by metering and submetering 
commonly includes measurements of quantity and time of resource use (electricity consumption, water consumption, etc.)