Property Groups are the primary mechanism in VCF 9.0 Automation for achieving "reusability" and standardization across multiple cloud templates (blueprints). Instead of manually defining the same inputs or constants in every individual YAML file—which is prone to human error and difficult to update—the administrator creates a centralized group. For the requirements provided, the administrator should Create a Property Group for constants (to hold the salt_master_id) and Create a Property Group for inputs (to hold size, OS, and location). These groups are then associated with the Production Project. The final step is to Update existing blueprints to reference these property groups using the prop syntax. This ensures that if the salt_master_id ever changes, the administrator only needs to update it in one central location, and all associated deployments will automatically reflect the change, significantly reducing operational overhead and ensuring environment consistency.