It's the IP address of your computer on the internet. Just put http:// and then the IP address of your computer in a browser and it will bring up the document root of your http server (assuming you've configured it correctly and it's running that is of course).
Oh if you're on a LAN then you'll need to tell your router to forward incoming traffic on port 80 (and 443 if you're using SSL/TLS) to the LAN IP of your computer too.
The option to do this is usually called something like "port forwarding". You'll also need to make sure that port 80 is open in your firewall settings too. Good luck!
Bookmarks