Apparently I'm 'very conservative'... probably because of my friend group, since I've never posted anything political on Facebook.

The four groups I’m in are all related to using a mobile device or wi-fi.

I’m pleasantly surprised but it appears deleting all of my content, unfollowing every person on my feed, not logging in except on incognito windows and very infrequently at best, and using ad blockers has effectively stymied facebook’s ability to establish a good notion of who I am beyond the most extreme basics.

I still use messenger although I try to use encrypted messages when I can, but they don’t mine that for advertising information according to their user policy. Not sure if they mine it for anything else.

Either way, good.

Honestly though, as William Wrigley Jr once wrote, "When two men always agree, one of them is unnecessary." I have one friend that I disagree with about literally everything, and I respect him a lot because every discussion we have is thoughtful, and my ideas and beliefs are better for having discussed them with him.

Anyways, your political bent is probably based on what types of posts you've read or liked, or even who has liked your comments, even if they were apolitical.

https://www.facebook.com/ads/preferences

And then open Your Information > Your Categories. I assume this is what they are talking about.