Tailscale is a networking tool that simplifies the process of connecting devices securely over the internet. It uses a technology called WireGuard to create a private network, allowing users to access their devices and services from anywhere without complicated configurations. With Tailscale, users can easily connect their computers, servers, and mobile devices, making remote work and collaboration more efficient. It is particularly useful for teams and individuals who need secure access to resources without the hassle of traditional VPNs.