Managed security services (MSS) is a service model or capability provided by cybersecurity service providers to monitor and manage security devices, systems, and even software-as-a-service (SaaS) applications.

Security monitoring, sometimes referred to as "security information monitoring (SIM)" or "security event monitoring (SEM)," involves collecting and analyzing information to detect suspicious behavior or unauthorized system changes on your network, defining which types of behavior should trigger alerts, and taking action on alerts as needed.