Cybersecurity is continuously evolving as digital systems, networks, cloud computing, and smart devices become more widespread. As cyberattacks grow increasingly complex, artificial intelligence (AI) has become an important tool for improving threat detection, security analysis, and incident response. **First: AI-Powered Threat Detection** Artificial intelligence uses machine learning, deep learning, and data analytics to identify unusual patterns and suspicious activities across networks and information systems. By analyzing large amounts of data, AI can help detect malware, network attacks, unauthorized access attempts, and phishing threats more efficiently. **Second: Security Incident Response** AI can analyze security events, assess potential risks, and help identify the nature of cyber threats. In some environments, automated systems can take defensive actions, such as isolating compromised devices or blocking malicious network traffic, reducing response time and minimizing potential damage. **Third: User and Device Behavior Analysis** AI-based systems can identify unusual changes in user and device behavior. For example, logging in from unfamiliar locations or accessing an unusually large number of files within a short period may indicate suspicious activity and trigger security alerts. **Fourth: Challenges and Limitations** Despite its benefits, AI also presents cybersecurity challenges. Attackers may use it to create more convincing phishing messages and automate parts of their attacks. Furthermore, AI systems can be affected by poor-quality training data or attempts to manipulate their models. Therefore, AI should complement—not replace—traditional security technologies, human expertise, and appropriate security policies. **Conclusion** Artificial intelligence plays an increasingly important role in developing modern cybersecurity systems by improving threat detection, supporting incident response, and identifying suspicious behavior. Combining AI with human expertise and established security practices can help build stronger, more effective, and more resilient cybersecurity defenses.