Device security refers to the measures taken to protect electronic devices, such as smartphones, tablets, and computers, from unauthorized access and cyber threats. This includes using passwords, encryption, and security software to safeguard sensitive information stored on these devices. Effective device security also involves keeping software up to date and being cautious about downloading apps or clicking on links from unknown sources. By implementing these practices, users can help prevent data breaches and ensure their personal information remains safe from cybercriminals and malware.