https://www.techradar.com/news/facebook-and-washington-shut-down-racially-targeted-ads

Facebook advertisers will no longer be able to target users based on their religion, sexual orientation or ethnic background in the United States, after the social media giant signed an agreement in Washington to overhaul their advertising practices.

The deal concludes a two-year investigation by the Attorney General’s Office, which saw undercover investigators create a number of ‘fake ads’ that excluded one or more ethnic minorities from viewing their advertisements for restaurants, housing, insurance, and employment opportunities. All 20 were approved.