No other political perspective is possible in their world view:

Hidden in plain sight under Ad Preferences is a section called Your Information. If you click on that tab, you’ll see an option for Your Categories, which contains a section called US Politics — in parentheses, Facebook will have you labeled as Very Liberal, Liberal, Conservative or Very Conservative.

Source: Facebook thinks it knows whether you’re liberal or conservative: Here’s how to find out | Fox News
For me, their political attribute was wrong. In fact, a lot of their database is garbage. And corporate advertisers were hoodwinked into paying premium dollars to Facebook for garbage.
Facebook is a dangerous propaganda platform that uses unreliable surveillance data to operate in a reckless manner world wide.