What does the icon next to the location icon mean? It has a lock with an arrow circling it.

Question

What does the icon next to the left of thelocation icon mean and to the right of the time? It has a lock with an arrow circling it. Thanks

Answer 1

It's the portrait orientation lock.  When on, and that icon showing, the screen won't rotate to landscape view when you rotate the phone. 
To turn it off - double click the home button to show the recently opened apps bar, slide it to the right showing the iPod controls and the Portrait Orientation Lock on the left.