Share a Wifi Password
It's now much easier to share a WiFi password with another device on iOS 11. Instead of speaking your complex WiFi password or texting it to someone you can simply approve them from your iPhone. You don't need an Apple router for this to work.
When a device that isn't on your WiFi wants to connect it will send a prompt to your iPhone or iPad on iOS 11 asking you to approve it. If you say yes, it will autofill the password and join the network.
It's that simple, and it works as long as both devices are on iOS 11.