Security refers to the measures taken to protect information, assets, or systems from unauthorized access, damage, or theft. In the digital world, security involves safeguarding personal data, networks, and devices from cyber threats such as hacking, malware, and phishing attacks. Effective security includes using strong passwords, encryption, firewalls, and antivirus software to prevent breaches. Physical security measures, like surveillance and access control, also play a crucial role in protecting valuable assets. With the increasing reliance on technology, maintaining strong security is essential for privacy, data integrity, and the prevention of financial or reputational damage.