Here's how you can move app tiles between groups in Windows 8. 1. Click on the app tile and hold your mouse button down. 2. Drag the app tile to the group you want it to be in. 3. If you want a new group, drag it to the space between groups or to the right off all existing groups.
For more, see the original article at the link below.
HDG Guide to Customizing and Organizing the Windows 8 Start Screen | Help Desk Geek