Gold plated outline Ground

Hi everyone and happy new year,

What is the purpose of this outline gold plated ground with vias fence?

Please see the attached picture

Thanks in advance

Nick

Via ground fencing → a cheaper version to edge plating. It could be to prevent unwanted energy from radiating out of the board edges. Or it could be to provide ground connection for some sort of edge connector (e.g. PCI slot mount).

Thank you languer!!