This DisplayString is the name of the underlying operating system the Check Point software is running on, per 'OS name' (e.g., Gaia, SecurePlatform, or a general-purpose Linux/Windows base on older deployments). Because Check Point has supported multiple OS bases historically, this field tells an admin which OS-specific commands, file paths, and upgrade procedures apply to this particular appliance. Encountering SecurePlatform here on what was assumed to be a modern Gaia-based appliance would mean an OS migration is overdue, since SecurePlatform is an older, end-of-life platform.