Combining the SNMP resource with a SNMP Console provides a powerful instrument of network monitoring. For example:
network diagram;
polling for network monitoring;
sending of e-mail, sms and so on when a trap is received;
network load graphs construction.
etc.
Example of consoles may be Ipswitch WhatsUp Gold or Zabbix. Below is a screen-shot of a WhatsUp Gold's Map used for network monitoring.