In your project, open the How to integrate panel, go to the UTMs for Meta Ads campaigns section and click the Include UTMs in campaigns button. The Apply UTMs modal opens, listing campaigns that are active or have spent in the last 30 days, with a search box and Select all and Deselect all buttons. Select the campaigns you want (up to 15 at a time, to stay within Meta's API limit) and click Apply UTMs. The system goes through the ads and applies the tracking pattern. Ads that already have the correct pattern are skipped automatically, and at the end a summary shows how many were updated, how many were skipped and any errors. Important: this replaces any different URL parameters the ad already had, so if you use UTMs from another tool, review them first.