TeamViewer is a comprehensive remote access and support platform used by millions globally for providing technical assistance, accessing computers remotely, and enabling collaborative work across devices. Founded in 2005 and based in Germany, it operates on a freemium model—free for personal use, with paid licenses for commercial deployments. What sets TeamViewer apart in the crowded remote access market is its zero-configuration approach: connections work through firewalls without manual port forwarding, thanks to relay servers and dynamic router detection. Understanding its session types (attended vs. unattended), security layers (end-to-end encryption, two-factor authentication, conditional access), and enterprise-grade features (mass deployment, custom branding, session recording) transforms TeamViewer from a simple screen-sharing tool into a strategic IT asset for organizations managing distributed endpoints, providing customer support, or enabling remote work at scale.