Difference between Monitors inserts and Main inserts on control room

Hello, what is the difference between those 2 area ?

The top set of Inserts is exclusive to a specific pair of Monitors, while those on the bottom are common to all. Since you only have one set of speakers it doesn’t really make a difference. But if you had multiple Monitors then that’s where you’d want to put the SoundWorks inserts so you’d have a unique instance of it for each Monitor.

The insert slots are listed as pre when you hover your mouse over them, but in fact those slots are post control room fader. What exactly are those insert slots pre then?