pin, unpin

Use pin to refer to placing an item, such as a tile, an app, or a command, in a given area of the UI, so it's always accessible in that area. Use unpin to describe removing a pinned item.

Examples
When you pin an app, it's added to the Start menu as a new tile.
Pin important messages to the top of the message list, and unpin them when you're done with them.

Pin apps to Start

1. Select the Start button, and then select All apps.

2. Press and hold (or right-click) the app you want to pin.

3. Select Pin to Start.