Your subscription link is a personal URL that keeps your client’s node list up to date automatically. Find it on your account page after logging in.
On iPhone (Shadowrocket): tap the + button, choose Subscribe as the type, paste the link, and save — or simply use the one-click import button on your account page. On Windows, Mac, or Android (Clash-family clients): open Profiles, paste the link, download, then pick a node and enable the system proxy switch.
Two things to remember: the link is tied to your account, so keep it private; and whenever nodes are updated or you renew, refreshing the subscription inside the client is all you need — no reinstalling, no reconfiguring.