As a Meta employee, I can honestly tell you what we know, and I do not know how we obtain all of it.

* Your full name
* Your full home address
* Your phone number
* Your e-mail
* Your government ID
* Your consumer report history
* The name of every family member
* The name of every friend
* The name of their family / friends
* Your marital status
* If you are faithful to your partner
* Your work history (all of it)
* Your education history (all of it)
* Your travel history (going back years)
* Your birth gender
* Your gender ID
* Your sexuality
* Your sexual preferences
* How often you're having sex
* Your partner's details (all the above)
* Your political ideology
* Your involvement with any group
* If you protest, we know
* If you're unhappy, we know

The amount of information we collect on you is insane. And we do it all for supposedly marketing and yes, we help the government since they have access to all this too.

So when someone says they want to avoid META or GOOGLE - respect.