Threat detection and response is the security workflow used to identify suspicious activity, investigate it, and take action before damage spreads. It combines monitoring, alerting, triage, correlation, and containment. The goal is not just to notice an event, but to decide whether it is part of an attack and what to do next.
This matters because modern attacks often blend into normal traffic, cloud logs, identity events, and application activity. Effective detection platforms turn raw telemetry into searchable evidence, helping analysts connect weak signals such as unusual logins, privilege changes, or data access spikes. In defense, this can speed incident response, reduce false positives, and support containment steps like isolating hosts, revoking credentials, or blocking malicious activity. In attacks, the same data can reveal lateral movement, persistence, or exfiltration if the telemetry is complete and well governed.