Windows 10’s new Wi-Fi Sense feature is designed to share your Wi-fi connection with friends and colleagues. The feature lets you share your network with others without seeing the actual network passwords. The passwords are encrypted and stored on Microsoft’s servers so they aren’t visible to outside users. Even when it’s turned on, you have to take another step to allow access, and you have control over which networks to share with which groups of contacts to share them. It’s essentially like Facebook can’t pick out individuals; you can only share with all your contacts in other words.”]
Source: https://www.computerworld.com/article/2975004/4-overblown-windows-10-worries.html