After installing this package you get a new dashboard in the developer section that displays your loadbalancing setup type and the registered servers.
If you are using traditional loadbalancing it will show the servers set in the umbracoSettings.config file.
If you are using the flexible loadbalancing introduced in 7.3.0 it will show the currently active servers.
The package can also be installed through nuget :
https://www.nuget.org/packages/Our.Umbraco.LoadBalancingDashboard