These are quick filters next to the search field. Active shows only campaigns, ad sets, or ads with an active status and hides paused ones. Had delivery shows only items with spend or impressions above zero in the period, which is useful for clearing everything that didn't run. Filter selected shows only the rows you checked, which helps you review a large selection before applying a bulk action. Click any of them again to turn it off. These filters also affect exports and Copy report, which work from what is visible on screen.