I use it for a bunch of stuff: to share access to my guest network with visitors: you can basically click the 'share' button and send an SMS / hangout / * message to someone with your network SSID / password for quick access.

I also use it to monitor my connection: do speed tests directly from the router (even remotely!).

And finally: monitoring network usage, stats, etc. It's a beautifully designed, fluid, fast, and just all around amazing app!