Security information and event management (SIEM) is a comprehensive approach to cybersecurity that combines the functionalities of security information management (SIM) and security event management (SEM). SIEM systems collect, aggregate, and analyze log data from various sources across an organization’s IT infrastructure to detect, monitor, and respond to potential security threats in real time. By providing centralized visibility and correlation of security events, SIEM helps identify anomalies, streamline incident response, and ensure compliance with regulatory requirements. These systems enhance an organization’s ability to protect against and mitigate the impact of cyberattacks and other security incidents.