Security team responsible for defending against attacks and maintaining security operations. Like the security guards and systems protecting your building.
The blue team monitors security alerts, patches vulnerabilities, and responds to incidents detected by their SIEM and other security tools.
Blue Team is a security operations function (people + processes) rather than a single cloud service. In cloud environments, Blue Teams commonly use each provider’s native logging, threat detection, and SIEM/SOAR integrations (plus third-party tools) to monitor, detect, respond, and harden systems.