This means that someone knows your IP address and the port you used in jupyter will be able to visit your jupyter laptop. For example, if you connect to the Internet behind a router, other computers can visit your laptop via http: // [your_ip]: 8888 to visit your laptop. 8888 is the default jupyter port.
IP-, IP-, :
jupyter notebook --ip=x.x.x.x
x.x.x.x - IP, .