All policy changes made in the Management console are logged in the Management Audit Log.
Policy Versions enables you to view the different versions of the policy with all the aggregated changes.
Policy Versions can be used to review all the pending changes in a policy before you Push Settings to the gateways
Users can also download different versions of the policy and compare them using an external text comparison tool.
Steps to view Policy Version:
Users can also download the policy and use it for reviewing or audit purposes