Network tester, how do i use it?

My rather small and financially poor network team have somehow managed to convince management to purchase a network tester, one of these with WiFi support.

https://www.fullcontrolnetworks.co.uk/products/optiview-xg-netscout/

I haven't the first clue how to use it though, other than RTFM does anyone know of good blogs or tips on how to use them effectively?

Are there any particularly neat things I can do with it that might impress the aforementioned management as to the usefulness of the device?

I'm not in any doubt that in future it's going to be a very useful tool, I just don't know where to start with it!

Cheers

Rich