What does this mean?

It means if your network is IPv6 native, you don't have to waste a very expensive IPv4 IP address, or proxy through one, to connect to it

Connect to what?

dig AAAA guthub.com is still empty.

I know it's a typo but guthub is a hilarious name.

	▲	tonymet a day ago \| parent [-]
		Maybe it’s German?