LAN address vs WAN address
LAN is local area network.
WAN is wide area network, aka the internet.
In most cases, your PC/phone is connected to a local network (LAN), it's your home/office network. Your local address is your computer's address on that network only.
Your router is the only device in your LAN that is directly connected to the internet. It routes (hence the name) traffic between your LAN and the internet. Your router is assigned a WAN address (aka public address) which is what online services see and care about. All devices connected to the same network will share a public address when connecting to the internet, but each will have a different local address.
In some cases, your router doesn't even have a public IP address. In those cases, you and other homes/offices share the same public IP.
To answer your question, you should consider your WAN address (which can be either IPv4 or IPv6, or both).
Your local address doesn't matter online.
IPv4 vs IPv6
IPv4 address look like this: xx.xx.xx.xx
where xx is a number between 0-255
IPv6 like this: xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:xxxx
where xxxx is a hexadecimal 'number' between 0000 and ffff