Data security and cyber threats are critical concerns in todays digital world. As businesses and individuals rely heavily on online systems, protecting sensitive information has become essential. Data security involves safeguarding data from unauthorized access, breaches, and loss through encryption, firewalls, and secure authentication methods. However, cyber threats such as malware, phishing, ransomware, and hacking attacks continue to evolve, targeting vulnerabilities in systems. These threats can lead to financial loss, identity theft, and reputational damage. To stay protected, organizations must adopt strong security practices, regularly update systems, and educate users about potential risks and safe online behavior.