Easily share your WiFi with friends on iOS 11, automatically sends passwords to nearby devices

iOS 11 includes many automatic features regarding first-time setup and account login. This extends to WiFi networks too. If a friend comes over with an iPhone running iOS 11, you can automatically log them in to your WiFi in one tap. ...
https://9to5mac.com/2017/06/06/ios-11-share-your-wifi/