This is the public IP address of the machine requested this page. If your mobile is behind a router or used a proxy server to request this page the IP address shown is your router or proxy server.
Internet Protocol Address (or IP Address) is an unique address that computing devices use to identify itself and communicate with other devices in the Internet Protocol network. Any device connected to the IP network must have an unique IP address within its network. An IP address is analogous to a street address or telephone number in that it is used to uniquely identify a network device to deliver mail message or call ("view") a website.