What setting must be enabled to view data in Demographics and Interests Reports?

To view data in Demographics and Interests Reports in Google Analytics, you must enable Advertising Features. These reports rely on data collected from the DoubleClick cookie (for web traffic) or device identifiers (for app traffic), which are associated with Google's advertising platforms. Enabling Advertising Features allows Analytics to collect this additional demographic and interest data. Content Grouping is used to organize content into logical structures, not to enable demographic reporting. User permissions on the view control who can access the data but don't enable the data collection itself. In-Page Analytics is a visualization tool that shows how users interact with your website pages, not a setting for collecting demographic data.