Purple teaming is a collaborative security exercise where red team and blue team specialists work together to test whether specific attacker techniques are actually visible to defenders. Instead of simulating a breach in isolation, the exercise focuses on known MITRE ATT&CK techniques and checks whether they produce logs, alerts, and response actions that are useful in practice.
This matters because many environments have security tools but lack proof that they detect the behaviors that matter most. Purple teaming helps identify gaps in telemetry, alert logic, and analyst workflows, making it valuable for detection engineering and incident response tuning. In real operations, teams use it to validate one technique at a time, confirm whether a signal appears, and decide whether the response is clear, timely, and actionable.