Which feature enables an administrator to review the Security policy rule base for unused rules?

Policy Optimizer provides a simple workflow to migrate your legacy Security policy rulebase to an App-ID based rulebase, which improves your security by reducing the attack surface and gaining visibility into applications so you can safely enable them. Policy Optimizer can also identify unused rules, duplicate rules, and rules that can be merged or reordered to optimize your rulebase. You can use Policy Optimizer to review the usage statistics of your rules and take actions to clean up or modify your rulebase as needed1. References: Security Policy Rule Optimization, Updated Certifications for PAN-OS 10.1, Free PCNSE Questions for Palo Alto Networks PCNSE Exam