the google analytics algorithms build a library of metadata on your content that tells them things like your income level, what your drive, places you visit, businesses you frequent, subscriptions and memberships you have, ailments you might suffer from, credit level, family size. basically anything it can glean from what you give it.

The data is stored in an “anonymized” state without your actual name or other personally identifiable info, but that’s a bit moot because they can usually identify you but your metadata fingerprint anyway and link it to you at will.