Tile Folders

[Wine Lady Tena Thompson]

How do you set up/ use these on start screen I accidentally hit something and name folder popped up

 

[Harrie-S]

Welcome to Windows Central,

See below link how to use them.
How to create Live Folders on Windows Phone 8.1 GDR1 | Windows Central

 

[Likwidz]

Drag a tile over another tile and a folder will be made