Private vs Public IP: What's the Real Difference and Why Should You Care? or Private vs Public IP – W

Private vs public ip is all about who can see what. Public is for the outside world, private is for your LAN.

If you’re hosting anything (like a Plex server), you’ll need to forward ports using your public ip. Tools like PortForward.com can guide you through it.

Also, your private ip range is usually 192.168.x.x or 10.x.x.x—memorize that!