Google explains: "You can pin an app's screen to keep it in view until you unpin it. "For example, you can pin an app and hand your phone to a friend. "With the screen pinned, your friend can use ...

Now open your Start Screen and go to the All Apps view by ... select Pin to Start. Else drag-and-drop it on to the Start Menu. You will now see the website tile pinned to your Windows 10 Start ...

This policy setting allows you to prevent users from changing their Start screen layout ... you will allow a user to select an app, resize a tile, pin/unpin a tile or a secondary tile, enter ...