Intrusion Detection refers to the process of monitoring network traffic and system activities for malicious actions or policy violations. It plays a crucial role in cybersecurity by identifying potential threats and breaches, allowing organizations to respond swiftly to protect their data and systems. There are various types of Intrusion Detection Systems (IDS), including network-based and host-based systems. These systems analyze patterns and behaviors to detect anomalies, helping to safeguard sensitive information and maintain the integrity of IT environments.