What's the point of Airdroid's "Find phone" feature if phone is not on the same network

I started using Airdroid today and was perplexed by how its "Find phone" feature works. As far as I can tell, my web Airdroid and my phone Airdroid are connected only when they are in the same local network. So if my phone is truly lost and thus not on the same network, I can't get connect to my phone via my web Airdroid. What's the point of the "Find phone" feature then?