This read-only value reports the Perfect Forward Secrecy setting for the proposal, specifically the Diffie-Hellman exchange group used. An admin reads it to confirm the strength of key-exchange security configured for that VPN's Phase Two negotiation, since a higher DH group provides stronger forward secrecy at greater computational cost. For example, an admin auditing VPN security posture would check this value to ensure PFS is enabled with an adequately strong DH group rather than left disabled.