Via DuckDuckGo News:

• “Google has created a new tracking method called FLoC, put it in Chrome, and automatically turned it on for millions of users.
• FLoC is bad for privacy: It puts you in a group based on your browsing history, and any website can get that group FLoC ID to target and fingerprint you.
• You can use the DuckDuckGo Chrome extension (pending Chrome Web Store’s approval of our update) to block FLoC’s tracking, which is an enhancement to its tracker blocking and directly in line with the extension’s single purpose of protecting your privacy holistically as you use Chrome.
• DuckDuckGo Search (via our website duckduckgo.com) is now also configured to opt-out of FLoC, regardless if you use our extension or app.”