Cybersecurity is the essential practice of defending internet-connected systems, networks, programs, and data from malicious digital attacks and unauthorized access. As technology has become deeply integrated into nearly every aspect of modern life, from critical national infrastructure to personal devices, the importance of robust cybersecurity measures has grown exponentially to safeguard data privacy, maintain operational continuity, and prevent significant financial and reputational damage. 

Common cyber threats include malware (such as viruses, ransomware, and trojans), phishing scams that manipulate human error to steal information, and denial-of-service (DoS) attacks that disrupt online services. To counter these evolving dangers, an effective cybersecurity strategy requires a multi-layered approach, combining technical solutions like firewalls, encryption, and antivirus software with a strong emphasis on user education and robust internal policies. Ultimately, cybersecurity is a shared responsibility, requiring individuals, businesses, and governments to remain vigilant and adaptive in the face of an ever-changing threat landscape.