It means you can't go online right now.Maybe something is wrong with your network.You need to check it and make it connect.Only when your computer is connected to the Internet,you can go online,such as chat with your friends and send messages!
Hello, my computer-cannot-connect-to-the-internet-it-says-i-am-offline
"Offline" indicates a disconnected state. Try to make another basic Connectivity.
1. Set router OFF.
2. Reset modem: Press & hold RESET button 10-20 secs.
3. Wait 60 secs.
4. Set router ON.
5. Reset router: Press & hold RESET button 10-20 secs.
6. Wait 60 sec.
Click [Start] – [Run...] – type: cmd, press [ENTER]
At the prompt (c:…..>) type: ipconfig /release, press [ENTER]
At the prompt (c:…..>) type: ipconfig /renew, press [ENTER]
If IP Address == 0.0.0.0 connect PC (wired) to router (if possible) or modem and attempt steps again.