Device linking is a cybersecurity feature that enables users to securely connect multiple devices - such as smartphones, tablets, or computers - to a single user account or service. This process often involves verifying each device through authentication methods like one-time passwords, QR codes, or push notifications. Device linking enhances user convenience by allowing seamless access to accounts from various devices while maintaining security controls. It also helps organizations monitor and manage which devices have account access, enabling them to detect unauthorized devices, enforce security policies, and revoke access if needed. Proper device linking reduces the risk of unauthorized access and improves the overall user experience.