Plugin Debugging: New Beta Feature!

How do I use this, exactly…? I make and work on private plugin extensions very often and after enabling this, I don’t know what its use is good for.

Is using this a faster way to reload your plugins after applying both small and large edits to them?

I also noticed it doesn’t show the plugin’s widget GUIs in any way so I can’t really watch the widgets work in real-time, or maybe that’s not what it’s for?

Is this just a replacement for using e.g. StarterGui to develop your plugins so you don’t need to load the source plugin place to work on it but really anywhere you want?

I’m not quite getting this, could someone explain?