Cybersecurity is important for teenagers to protect sensitive data and personal information from theft and damage. The document outlines several common cybersecurity threats faced by teenagers, including data theft where hackers can use personal and financial information for identity theft and fraud. Mobile malware attacks have risen 50% since 2018, threatening teenagers who increasingly use smartphones. Hackers are also taking advantage of social media and messaging platforms to spread phishing scams and access personal information. The document provides tips for teenagers to avoid sharing too much personal information online, invest in antivirus software, keep all devices and software updated, be wary of phishing emails and links, and avoid unknown websites or downloading untrusted software.