V2Ray (and its Xray fork) tunnels traffic inside ordinary-looking WebSocket-over-TLS connections on port 443, which makes it far harder to detect or throttle than classic VPN protocols. It shines on networks that block VPN ports.
Your account is a VLESS UUID delivered as a connection URI and a QR code that clients such as v2rayNG (Android), Shadowrocket / Streisand (iOS), v2rayN (Windows) and V2Box (macOS) can import in one tap.