iCloud: online

online

An iOS device is online if it’s turned on (with or without a passcode lock) and connected to a data network, such as EDGE, 3G, or Wi-Fi. A Mac computer is online if it’s turned on and connected to the Internet via Wi-Fi or Ethernet.

If a device is online, a green dot Image of green dot next to device name meaning the device is online appears beside the device in the My Devices list.