I use it to compartmentalize stuff I'm working on, and 4 finger swipe between them.
I have a couple instances of VSCode, some app/debugging browser windows, some chrome profile windows etc... all running full screen and I spend my day brush swiping between them.
It may be different for me because I work on a 14" macbook pro, mostly at coffee shops or unusual work locations, so I don't have a large monitor setup. I don't think I'd use it much if I had more of a traditional desk/multimonitor config.