Sentinel Advisor, powered by Security Nexus, is an optional data subscription service that provides device-level correlation between real-time events, from intrusion detection and prevention systems, and from enterprise vulnerability scan results. Advisor acts as an early warning service and detects attacks against vulnerable systems by providing normalized attack information. It also provides the associated remediation information.
The Advisor subscription is optional. However, it is necessary if you want to use the Sentinel Exploit Detection or the Advisor Reporting features.