Access the settings by opening the Google Settings app from your Android app drawer and tapping the option for Android Device Manager.
From there you can choose whether to enable remote location or wiping. This lets you login to the Android Device Manager website and find your phone on a map, cause your device to ring so you can find it if it’s in your other pants pocket or lost in couch cushions, or perform a factory reset if the phone’s been lost or stolen. (more)