We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
Facebook has offered "myPersonality" for a decade. Since they seem to be in the personal information business, your data might be useful to them.
If interested, you can do that myPersonality test here, away from Facebook. Not very illuminating to see I came out as Traditionalist. In fact, probably only interesting to marketing people although it is used for social science research too.
They use this test, together with other information they can find about you (on the web) as a marketing tool. Then again,
with this, they learn a little about your personal twists and turns. Saleable merchandise.
This morning I realized I was looking at a highly targeted Ad, they were offering me a sweatshirt emblazoned with the name and emblem of my High School. No coincidence; yes, sometime in the past I left that info on the net, and here it was coming back to me, at my IP address.
Facebook, Google, YouTube, Amazon, and anything starting with "I-" are spying on you non-stop, even when you sleep. Your phone knows where you are going to go before you go there. They know all your personal habits, your age and gender, your race, what you "like" and what your "favorites" are, what you buy, how you dress, where you went to school, the languages you speak, your sports background (whether your own or the teams you root for), who your friends and acquaintances are, your political views, who you donate money to, where you live, what your property taxes are and what you could get if you sell your house, who your neighbors are, what your religious beliefs are, and on and on. You make it worse when you respond to any "polls," "personality tests," "test your knowledge quizzes," and the like. Also if you make the mistake of putting any personal, family or genealogical material on your Facebook page, that's all out there too for marketers, and I believe scammers.
I am also convinced that Facebook tries to manipulate and influence public opinion by figuring out someone's political persuasion and then flooding them with fake news stories which they then hope will be "shared" by the person with all the person's "friends." And I am halfway convinced that Facebook itself pretends to be people you know and sends you political stuff that you think is from them. (My belief of this is that there are a couple of politically obnoxious people on my "friends"list that I have repeatedly deleted, and yet I continue to get all the political propaganda from them.)
It's a bit hidden but often if you click the menu in the upper right corner of a post you will get the option to block content from the source your friend shared from. It doesn't always appear but often enough to be usrful. I'd say also avoid commenting or otherwise reactung to political posts. FB doesn't care if your reaction is positive or negative. It's algorithms assume any interaction with a post mean you want to see more posts like that.
I personally have given up caring about data mining. To a lage extent it is a bogus gane of applying percentages to chances and statistical gibberish extended to decimal places far beyond significance. If they truly knew what they were doing someone would have predicted Trump. They didn't.