Primarily, I use it to monitor the uptime of all equipment, as well as network connectivity, availability, and the services running on those devices. I believe those are the key aspects I've found useful.

We analyze all the information tracked on the network for our different sites with paid processing.

Our customers use the solution for network monitoring.

The solution is useful for monitoring network devices.

I use the Nagios Network Analyzer during POCs of the customer environment. It offers visibility into their network behavior. 

We are a reseller and well sell several Nagios products, including Network Analyzer.

It is used for collecting data from the flow of network traffic.

We primarily use the solution for monitoring.