Cyber security is the practice of protecting systems, networks, and data from digital attacks, theft, and damage. As technology advances, cyber threats such as hacking, phishing, ransomware, and data breaches are becoming more frequent and sophisticated. Strong cyber security measures are essential to safeguard sensitive information, maintain privacy, and ensure the smooth functioning of businesses and governments. It involves using firewalls, antivirus software, encryption, and regular system updates. Educating users about safe online practices also plays a vital role. With the growing reliance on digital platforms, investing in robust cyber security is crucial for protecting individuals and organizations from cybercrime.