The most valuable feature in Bivy Stick Mesh happens automatically. When a device is not able to send a message via satellite or cellular, it will send it through the mesh network to a device that has good satellite or cellular signal strength. Every device knows the location, satellite signal strength, and cellular signal strength of every other device and it will use that information to relay a message to a device with better signal strength when it needs to.
If you do not wish for your device to be used to relay messages from other devices, you can turn it off by clicking Enable Mesh Relay. When a message is relayed from one device to another, and then transmitted to satellite, the device that originated the message pays for it.