SIEM, or Security Information and Event Management, is a comprehensive cybersecurity solution that collects, correlates, and analyzes data from various sources within an organization's IT environment. It monitors for suspicious activities, security events, and potential threats. SIEM systems provide real-time insights into network and system events, helping security teams detect and respond to security incidents more effectively. They utilize threat intelligence, machine learning, and rule-based algorithms to identify anomalies and patterns indicative of cyberattacks. SIEM is a crucial tool for enhancing threat detection, incident response, and compliance management, offering a centralized platform for security monitoring and event management.