Display server informations, like number of online users, server sessions, memory, software version, etc...
You can send messages to info@serverinfo.yourjabberdomain to receive the requested information.
Also, you can open a TCP connection in port 4455 and same messages. It is useful to create scripts for use in monitoring softwares (Nagios, Zabbix, MRTG)
More information in the readme plugin page, on console admin.