It allows us to make a mesh network (interconnected nodes where you can contact a node even if it's not in range for you, by using other nodes) with Lora radio devices. Lora is slow but has long range. I think it works better when you have line of sight, like if someone can put a node on a mountain, it would help everyone.

I think people might have sent audio with it but it's mostly useful for text messages. It could be useful if the Internet is down, maybe, but it's more like a toy.