A more thorough explanation:

The Public Buildings Service (PBS) is a division of the General Services Administration (GSA) that is responsible for constructing federal buildings and managing federally owned and leased property through 11 regional offices.

For example, if the federal government needs a new office building in a certain city, the PBS would be responsible for designing and constructing the building. Additionally, if the federal government leases office space in a privately owned building, the PBS would be responsible for managing that property.

The PBS plays an important role in ensuring that the federal government has safe and functional buildings to conduct its business. By managing these properties, the PBS helps to ensure that taxpayer dollars are being used efficiently and effectively.