The idea is for account with developer licence and necessary access to a server to be able to Impersonate any user from his account directly.
You select the user you want to impersonate from a drop down list then everything you view - his selects, read & write data, folder access etc.. - are like the member itself on your server.
Why :
- You may lack free licence slot to do proper testing.
- More secure : No reason to share a password of a testing account.
- With subscription hub it require to register alternative email to get access which is a pain point for large scale testing.
- Faster unitary test when developing.
- Better assistance/debug capabilities as you're only a few click await from seeing what the user see.