Why am I seeing random Meta-powered ads outside of apps?

This is usually caused by an app with permission to display over other apps, adware, or a website that was allowed to send notifications. The Meta branding doesn’t necessarily mean the Meta app is responsible. Check recently installed apps, remove anything suspicious, and review your browser notification permissions. On Android, also check Settings > Apps > Special app access > Display over other apps and disable that permission for anything you don’t recognize.

Try restarting the phone in Safe Mode. If the ads stop there, a third-party app is almost certainly causing them. Uninstall recently added apps one at a time, especially cleaners, launchers, wallpapers, games, or unofficial downloads. You can also run Google Play Protect and clear unwanted browser notifications.