Reddit is building a detailed behavioral profile of you through automatic data collection regardless of whether you are a registered user, which means even passive browsing of Reddit generates data that can be used for advertising and other purposes.
Reddit collects a wide range of personal data including browsing activity, location inferences, device identifiers, and all content you post, and uses this data for targeted advertising and to train AI and machine learning models. Users who have not reviewed their privacy settings may be unknowingly contributing their content and behavioral data to third-party ad targeting and AI development without realizing the scope. You can limit data sharing for advertising and exercise deletion or opt-out rights by visiting Reddit's Privacy Settings at reddit.com/settings/privacy or submitting a data request at reddit.com/settings/data-request.