Group Interviews/Informational Meetings

I have been selected to be apart of about 9 of these now because I’ve been applying to a bunch of remote jobs while I’m in my current position. I haven’t joined one yet but I also don’t really .. want to? I am confused by this. I’m sure it’s because of the high amount of applications they receive but like I don’t get what these actually do. How does this make the process simpler? Should I be joining these informational meetings? They are all around an hour long which is egregious especially for somebody who currently works full time! Does anyone have any experience with this??