SIEM, or Security Information and Event Management, is a cybersecurity framework that combines security information management (SIM) and security event management (SEM). It involves collecting and analyzing data from diverse sources within an organization's IT infrastructure, such as logs, network traffic, and system events. SIEM tools then correlate and contextualize this data to detect and investigate security incidents, threats, and vulnerabilities. It provides real-time visibility into an organization's security posture, aiding in incident response, compliance reporting, and threat detection. SIEM security is a critical component of modern cybersecurity, offering proactive monitoring and alerting to defend against evolving cyber threats and protect sensitive data.