The Best Campaigns and Best Ads sections show the Top 3 by a criterion you choose with clickable chips: Highest Spend, Lowest CPM, Lowest CPC, Highest CTR, Most Results, Most Purchases, Lowest Cost/Purchase, Highest Revenue, Highest ROAS, Most IG Visits, Lowest Cost/IG Visit and Lowest Cost/Lead. Anyone viewing the report can change the criterion on the spot, without editing anything. For criteria such as ROAS or Cost/Purchase, items with no data for that metric are ignored in the ranking, so a campaign with no purchases doesn't show up as the best. There are also chips to choose which metrics appear on the Top 3 cards.