Global scope means the address is valid across the internet and these address start with prefix 2000::/3 whereas scope link is used for the hosts on local network and they have a prefix of fe80::/10.
In IPv6 address configuration, scope global denotes an address accessible globally over the internet, often associated with the prefix range for global unicast addresses. Commonly, global unicast addresses start with 2000::/3. On the other hand, scope link signifies an address reachable only within the immediate network, typically using the fe80::/10 prefix, restricting its accessibility beyond that network segment.
