A solicited-node address is created by taking the least-significant 24 bits of a unicast or anycast address and appending them to the prefix ff02::1:ff00:0/104.
Each interface must be listening to its solicited-node multicast MAC address associated to them.
[2] Assume a host with a solicited-node multicast address of ff02::1:ff28:9c5a.
This number would typically be one, but there could be a few because the mapping function is not a 1:1 mapping, like for example if the same host bear the same last 24 bits of their IPv6 address (2001:db8:1::55 and 2001:db8:2::55 has the same solicited-node multicast address).
This means that a host should not need to be interrupted as often to neighbor solicitation requests, compared to ARP in IPv4.