Forcing relay mode is provided for testing and emergency purposes. It will increase latency; sometimes by a lot.
Alternatives to relay mode include:
Using wired Ethernet instead of Wi-Fi will also reduce packet loss.
A VPN service, like Speedify, will likely be better than using a TURN server.
Uses of relay mode include:
Can potentially reduce packet loss with some guests on bad connections
Has the advantage of hiding your IP address from peers.
You can deploy your own TURN server if intending to use this feature a lot.
Please feel free to donate to OBS.Ninja to help support the provided TURN servers. Current TURN servers are deployed in North America and Germany. TCP/UDP on port 443.