This means Meta is building a detailed profile of your internet behavior far beyond what you do on Facebook or Instagram, including potentially sensitive browsing on health, financial, or political sites.
Meta's policy authorizes collection of an exceptionally broad range of personal data — including location, biometric features, financial information, browsing history across third-party sites, and sensitive inferences about health and political views — primarily to serve targeted advertising. Non-users who have never created a Meta account are also subject to data collection when they visit sites using Meta's tracking tools such as the Meta Pixel. You can review and limit off-platform tracking by visiting Facebook Settings > Your Facebook Information > Off-Facebook Activity and clearing or restricting that data.